Add new tool to list all threads (posts) in a Discord forum channel,
including both active and archived threads. This addresses the limitation
where discord_search_messages only returns 25 message results and doesn't
provide a complete thread listing.
- Fetch active threads via channel.threads.fetchActive()
- Optionally fetch archived threads via channel.threads.fetchArchived()
- Deduplicate and sort threads by creation date (newest first)
- Return thread metadata including id, name, creator, dates, message count
- Implement searchMessagesHandler to search for messages in a Discord server.
- Add SearchMessagesSchema for input validation.
- Update toolList to include discord_search_messages tool.
- Modify transport and tools to handle new search messages functionality.
- Added handlers, schemas, and MCP tool wiring for creating, editing, and deleting Discord categories (GuildCategory).
- Fixed all .create/.edit argument errors for both category and text channel operations.
- Registered new tools in toolList and MCP server.