[Feature]: Add Keyboard Shortcut Support

[04shubham7]

So, what is it about?

Enable keyboard shortcuts (mute/unmute, chat, etc.) for a better user experience.

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[akash205sharma]

Hi @04shubham7 could you assign this to me

[Shreyanshi210205]

@04shubham7 Please assign this issue to me .
I plan to implement keyboard shortcuts in the front-end to enhance user experience during calls (e.g., quick mute/unmute, toggle camera, focus chat input, open shortcuts help).

1.Use react-hotkeys-hook
2.Connect each shortcut to existing WebRTC control functions.
Example:
M → toggles microphone (MediaStreamTrack.enabled = false/true)
V → toggles camera
C → focuses chat input
etc.

[04shubham7]

@Shreyanshi210205 Wait for predecessor issue to be completed, i will notify you when to work on this issue

[Shreyanshi210205]

@04shubham7 Please notify when to work on this issue.