Show agent skills, flows, and MCP tools in chat tools menu (#5444)

* show agent skills, flows, and MCP tools in collapsible sections in chat tools menu

* fix tools menu toggle disabled bypass, add border-none to buttons, and useMemo improvements

* replace mcp server cache with loading state for mcp servers

* enable sub-skill management

* refactor

* Translations for chat tools menu improvements (#5448)

* normalize translations

* update translations

* norm translations

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Co-authored-by: Timothy Carambat <rambat1010@gmail.com>

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Co-authored-by: Timothy Carambat <rambat1010@gmail.com>