feat: Add video call support

[kfiven]

Description

Fixes #528

Revives and continues #2335 (Element Call support), as the original PR has stalled.

Merged dev into this branch, resolved conflicts, and incorporated patches from @YoJames2019 to bring everything up to date and reviewable.

Credits to @GigiaJ for the original implementation and @YoJames2019 for follow up patches.

Here's laundry list of things I feel like should be addressed before merging: (Feedback welcome!)

Need to fix (help would be appreciated):

• User doesn't show up when joining the call sometimes.
• Make E2EE Voice rooms work.
• Voice Room Permissions
• Some kind of UI for homeserver's that don't support call features.
• Connecting/disconnecting to voice rooms takes seconds.
• Better new room creation experience, Have voice rooms as different type.
• Connecting status.
• Disable Webcam by default.
• Add our own Call controls instead of default Element call controls.
• Deafen functionality. (If possible, haven't investigated)

Nice to haves:

• Show a badge on space if in a voice room.
• User voice status in the room sidebar. (Blocked by official Element-call)
• User Muted Status in room sidebar. (Blocked by official Element-call)
• widget Folds/Cinny theming. (Blocked by official Element-call)
• Request Camera permissions only on enabling camera.
• Show duration of the call in the call status navigation.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Test build: https://2680--pr-cinny.netlify.app/

[chxreyes]

My testing on Firefox and bazzite has been putting all of the audio in the right channel only. Not sure if this is a Firefox audio bug or something with the web bindings for audio in cinny.

[jocelynthode]

Can confirm I only have sound on one side on Firefox.

version: 147.0.4 

[ajbura]

बढ़या लग रही है