Moved agent components into the agent folder (#5496)

### What problem does this PR solve?



### Type of change


- [x] Documentation Update

docs/references/agent_component_reference/_category_.json → docs/guides/agent/agent_component_reference/_category_.json

 {
   "label": "Agent Components",
-  "position": 3,
+  "position": 20,
   "link": {
     "type": "generated-index",
     "description": "A complete reference for RAGFlow's agent components."

docs/references/agent_component_reference/generate.mdx → docs/guides/agent/agent_component_reference/generate.mdx

 
 Where `{source_text}` and `{target_lang}` are global variables defined by the **Begin** component, while `{translation_1}` is the output of another **Generate** component with the component ID **Translate directly**.
 
+
+:::danger IMPORTANT
+A **Generate** component relies on keys (variables) to specify its data inputs. Its immediate upstream component is *not* necessarily its data input, and the arrows in the workflow indicate *only* the processing sequence.
+:::
+
+![variable_settings](https://github.com/user-attachments/assets/cb024c9e-264a-43ff-9ee7-8649afd571b0)
+
+Keys in a **Generate** component are used in conjunction with the system prompt to specify data inputs for the LLM. Use a forward slash `/` to show the keys to use.
+
 ### Cite 
 
 This toggle sets whether to cite the original text as reference. 
 :::
 
 
-### Key (Variable)
-
-:::danger IMPORTANT
-A **Generate** component relies on keys (variables) to specify its data inputs. Its immediate upstream component is *not* necessarily its data input, and the arrows in the workflow indicate *only* the processing sequence.
-:::
-
-![variable_settings](https://github.com/user-attachments/assets/cb024c9e-264a-43ff-9ee7-8649afd571b0)
-
-Keys in a **Generate** component are used in conjunction with the system prompt to specify data inputs for the LLM. As shown in the above screenshot, the values are categorized into two groups:
-
-- **Component Output**: The value of the key should be a component ID.
-- **Begin Input**: The value of the key should be the name of a global variable defined in the **Begin** component.
-
 ## Examples
 
 You can explore our three-step interpreter agent template, where a **Generate** component (component ID: **Reflect**) takes three global variables:

docs/references/agent_component_reference/rewrite.mdx → docs/guides/agent/agent_component_reference/rewrite.mdx

 A **Rewrite** component is essential when you need to optimize a user query based on the context of previous conversations. It is usually the upstream component of a **Retrieval** component.
 
 :::tip NOTE
-See also the [Keyword](https://ragflow.io/docs/dev/keyword_component) component, a similar component used for multi-turn optimization.
+See also the [Keyword](./keyword.mdx) component, a similar component used for multi-turn optimization.
 :::
 
 ## Configurations

docs/references/agent_component_reference/switch.mdx → docs/guides/agent/agent_component_reference/switch.mdx

 
 ## Scenarios
 
-A **Switch** component is essential for condition-based direction of execution flow. While it shares similarities with the [Categorize](https://ragflow.io/docs/dev/categorize_component) component, which is also used in multi-pronged strategies, the key distinction lies in their approach: the evaluation of the **Switch** component is rule-based, whereas the **Categorize** component involves AI and uses an LLM for decision-making. 
+A **Switch** component is essential for condition-based direction of execution flow. While it shares similarities with the [Categorize](./categorize.mdx) component, which is also used in multi-pronged strategies, the key distinction lies in their approach: the evaluation of the **Switch** component is rule-based, whereas the **Categorize** component involves AI and uses an LLM for decision-making. 
 
 ## Configurations
 

docs/release_notes.md

 
 - Supports DeepSeek R1 and DeepSeek V3.
 - GraphRAG refactor: Knowledge graph is dynamically built on an entire knowledge base (dataset) rather than on an individual file, and automatically updated when a newly uploaded file starts parsing. See [here](https://ragflow.io/docs/dev/construct_knowledge_graph).
-- Adds an **Iteration** agent component and a **Research report generator** agent template. See [here](./references/agent_component_reference/iteration.mdx).
+- Adds an **Iteration** agent component and a **Research report generator** agent template. See [here](./guides/agent/agent_component_reference/iteration.mdx).
 - New UI language: Portuguese.
 - Allows setting metadata for a specific file in a knowledge base to enhance AI-powered chats. See [here](./guides/configure_knowledge_base/set_metadata.md).
 - Upgrades RAGFlow's document engine [Infinity](https://github.com/infiniflow/infinity) to v0.6.0.dev3.
 
 - [Construct knowledge graph](./guides/configure_knowledge_base/construct_knowledge_graph.md)
 - [Set metadata](./guides/configure_knowledge_base/set_metadata.md)
-- [Begin component](./references/agent_component_reference/begin.mdx)
-- [Generate component](./references/agent_component_reference/generate.mdx)
-- [Interact component](./references/agent_component_reference/interact.mdx)
-- [Retrieval component](./references/agent_component_reference/retrieval.mdx)
-- [Categorize component](./references/agent_component_reference/categorize.mdx)
-- [Keyword component](./references/agent_component_reference/keyword.mdx)
-- [Message component](./references/agent_component_reference/message.mdx)
-- [Rewrite component](./references/agent_component_reference/rewrite.mdx)
-- [Switch component](./references/agent_component_reference/switch.mdx)
-- [Concentrator component](./references/agent_component_reference/concentrator.mdx)
-- [Template component](./references/agent_component_reference/template.mdx)
-- [Iteration component](./references/agent_component_reference/iteration.mdx)
-- [Note component](./references/agent_component_reference/note.mdx)
+- [Begin component](./guides/agent/agent_component_reference/begin.mdx)
+- [Generate component](./guides/agent/agent_component_reference/generate.mdx)
+- [Interact component](./guides/agent/agent_component_reference/interact.mdx)
+- [Retrieval component](./guides/agent/agent_component_reference/retrieval.mdx)
+- [Categorize component](./guides/agent/agent_component_reference/categorize.mdx)
+- [Keyword component](./guides/agent/agent_component_reference/keyword.mdx)
+- [Message component](./guides/agent/agent_component_reference/message.mdx)
+- [Rewrite component](./guides/agent/agent_component_reference/rewrite.mdx)
+- [Switch component](./guides/agent/agent_component_reference/switch.mdx)
+- [Concentrator component](./guides/agent/agent_component_reference/concentrator.mdx)
+- [Template component](./guides/agent/agent_component_reference/template.mdx)
+- [Iteration component](./guides/agent/agent_component_reference/iteration.mdx)
+- [Note component](./guides/agent/agent_component_reference/note.mdx)
 
 ## v0.15.1