Moved agent components into the agent folder (#5496)

### What problem does this PR solve?



### Type of change


- [x] Documentation Update

docs/guides/agent/agent_component_reference/note.mdx

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+---
+sidebar_position: 13
+slug: /note_component
+---
+
+# Note component
+
+The component that keeps design notes.
+
+---
+
+A **note** component allows you to keep design notes, including details about an agent, the output of specific components, the rationale of a particular design, or any information that may assist you, your users, or your fellow developers understand the agent.
+
+## Examples
+
+Explore our customer service agent template, which has five **Note** components:
+
+1. Click the **Agent** tab at the top center of the page to access the **Agent** page.
+2. Click **+ Create agent** on the top right of the page to open the **agent template** page.
+3. On the **agent template** page, hover over the **Customer service** card and click **Use this template**.
+4. Name your new agent and click **OK** to enter the workflow editor.
+5. Click on the **note** component to add or update notes.