Doc: Added Integrate Confluence (#14131)

### What problem does this PR solve?

Added a guide on integrating Confluence as connector.

### Type of change

- [x] Documentation Update

docs/guides/dataset/add_data_source/add_confluence.md

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+---
+sidebar_position: 4
+slug: /add_confluence
+sidebar_custom_props: {
+  categoryIcon: SiGoogledrive
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+---
+
+# Connecting Confluence to RAGFlow
+
+Integrate Confluence as a data source.
+
+---
+
+This guide outlines the integration of Confluence as a data source for RAGFlow.
+
+## Prerequisites
+
+Before configuring the connector, obtain the following credentials from your Atlassian account:
+
+- **Confluence user Email**: The email address of the account performing the indexing.
+- **Atlassian API Token**: Generated via [Atlassian Account Settings](https://id.atlassian.com/manage-profile/security/api-tokens).
+- **Confluence base URL**: The instance URL (e.g., `https://<your-org>.atlassian.net/wiki`).
+
+## Configuration steps
+
+### Define Confluence as an external data source
+
+Navigate to the **Connectors** or **External Data Source** section in the RAGFlow Admin Panel and select **Confluence**. Enter the following in the popup window:
+
+- **Is Cloud** - A toggle indicating whether this is a Confluence Cloud instance.
+  - `Yes` (default): Confluence Cloud.
+  - `False`: Confluence Server/Data Center.
+- **Name**: *Required* A unique identifier for your Confluence connector (e.g., `Engineering-Wiki`).
+- **Confluence Username**: *Required*
+  - For Confluence Cloud: The full email address you use to log into Confluence.
+  - For Confluence Server/Data Center: Your login ID, often a shorthand name.
+- **Confluence Access Token**: *Required* The authentication key that allows RAGFlow to act on your behalf to read and index your wiki pages.
+  - For Confluence Cloud: An Atlassian API Token, a secure string generated from your global Atlassian account. Create one from id.atlassian.com/manage-profile/security/api-tokens.
+  - For Confluence Server/Data Center: Your Personal Access Token (PAT). You are required to log in to your company’s Confluence, click on your Profile Picture in the top right, select Settings, then, in the left-hand sidebar, look for Personal Access Tokens.
+- **Wiki Base URL**： The base URL of your confluence instance, e.g., https://your-domain.atlassian.net/wiki.
+- **Index Mode**
+  - `Everything`: (Default) Indexes all pages the provided credentials have access to.
+  - `Space`： RAGFlow restricts indexing only to the Space Keys you explicitly list in the configuration.
+    - **Space Keys:** Specify keys (e.g., `ENG, HR`) separated by commas to restrict indexing. Leave blank to index all accessible spaces.
+
+Once configuration is complete, click **Confirm** to save your changes.
+
+### Link to a dataset
+
+Credentials alone do not trigger indexing. You must link the data source to a specific dataset:
+
+1. Navigate to the **Dataset** tab.
+2. Select or create the target Dataset.
+3. Navigate to the Dataset's **Configuration** page and select **Link data source**.
+4. Choose the previously created Confluence connector in the popup window.

docs/guides/dataset/add_data_source/add_github_repo.md

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-sidebar_position: 5
+sidebar_position: 15
 slug: /add_github_repo
 sidebar_custom_props: {
   categoryIcon: SiGoogledrive
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 # Add GitHub repo
 
-Link your GitHub repofor pull request or issue synchronization.
+Link your GitHub repo for pull request or issue synchronization.
 
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