add per user voice activity ring indicators

[TomOdellSheetMusic]

Description

Relies on SableClient/SableCall#21 !
This PR adds two more indicators as to who is talking in a call. In a room, it will show green rings around the speaking member's avatars in the room navigation and the bottom status bar. The bottom status bar also already had a written indicator that seems to not have worked before (or at I least I don't see it on the nightly desktop builds). In a 1:1 call, both bottom status bar indicators are shown.

Fixes SableClient/SableCall#9

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

AI disclosure:

• Partially AI assisted (clarify which code was AI assisted and briefly explain what it does).
• Fully AI generated (explain what all the generated code does in moderate detail).

[eleboucher]

can you please don't remove the ai part of the pr description please and fill it if necessary