Allow enabling/disabling specific LSP servers directly from the LSP panel

[akira1ce]

Currently, enabling or disabling a language server requires editing settings.json, which is not very convenient when switching between projects or experimenting with different LSPs.

It would be very helpful if the LSP panel provided an option to enable/disable individual servers with a simple click (e.g., toggle button or context menu).

Benefits:
• Faster workflow without editing config files.
• Easier to temporarily disable conflicting or unused servers.
• Improves discoverability of available LSP servers.