settings_ui: Move MCP server timeout setting to MCP subpage (#60069)

This moves the MCP timeout setting to the MCP subpage, instead of
rendering it in a separate section called "Context Servers"

Before:

<img width="896" height="332" alt="image"
src="https://github.com/user-attachments/assets/edf6e681-4bad-43f5-89b0-3e8228f74f7a"
/>

After:

<img width="660" height="222" alt="image"
src="https://github.com/user-attachments/assets/7b2bfbea-f0c7-4419-8d06-dfc7d7f740e8"
/>


Release Notes:

- N/A
3eb9bf2d21Bennet Bo Fenner committed on 6/29/2026, 10:06:35 AM· committed by GitHubparent3d1b26d
2 files changedLine totals unavailable