docs: add RSS feeds integration documentation (#2288)

* docs: add RSS feeds integration documentation

Add detailed documentation for RSS feed integration covering:
- Publishing lists as RSS feeds with authentication tokens
- Consuming external RSS feeds with automatic bookmark creation
- Feed scheduling and management features
- Configuration options and troubleshooting guides
- API access and best practices

* changes

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Co-authored-by: Claude <noreply@anthropic.com>

1 files changed, 50 insertions, 0 deletions

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+# RSS Feeds
+
+Karakeep offers RSS feed integration, allowing you to both consume RSS feeds from external sources and publish your lists as RSS feeds for others to subscribe to.
+
+## Publishing RSS Feeds
+
+You can publish any of your lists as an RSS feed, making it easy to share your bookmarks with others or integrate them into RSS readers.
+
+### Enabling RSS for a List
+
+1. Navigate to one of your lists
+2. Click on the list settings (three dots menu)
+3. Toggle the "RSS Feed" switch to enable it
+4. Copy the generated RSS feed URL
+
+### What Gets Published
+
+RSS feeds include:
+- **Links**: Bookmarks of type "link" with their URL, title, description, and author
+- **Assets**: Uploaded files (PDFs, images) are included with a link to view them
+- **Tags**: Bookmark tags are exported as RSS categories
+- **Dates**: The bookmark creation date is used as the publication date
+
+Note: Text notes are not included in RSS feeds as they don't have an associated URL.
+
+### Security Considerations
+
+- Each RSS feed requires a unique token for access
+- Tokens can be regenerated at any time, which will invalidate the old URL
+- Disabling RSS for a list immediately revokes access
+
+## Consuming RSS Feeds
+
+Karakeep can automatically monitor RSS feeds and create bookmarks from new entries, making it perfect for staying up to date with blogs, news sites, and other content sources.
+
+### Adding an RSS Feed
+
+1. Go to **Settings** → **RSS Feeds**
+2. Click **Add Feed**
+3. Enter the feed details:
+   - **Name**: A friendly name for the feed
+   - **URL**: The RSS/Atom feed URL
+   - **Enabled**: Toggle to enable/disable the feed
+   - **Import Tags**: Enable to import RSS categories as bookmark tags
+
+### How It Works
+
+- Karakeep checks enabled RSS feeds **every hour**
+- New entries are automatically created as bookmarks
+- Duplicate entries are automatically detected and skipped