Bubbles

Full implementation of Bubbles functionality. This includes:
- [!] Managing Channels [❌]
- [!] Bubble / Channel Permissions [❌]
- Reactions [❌]
- [!] Invites [❌]
- [!] Replies [❌]
- [!] Posting [❌]
- Forwarding [❌]

> [!NOTE]
> [!] indicates essential functionality.
> [❌], [🟦] and [✅] are Todo, In Progress and Done respectively.