- replaced many uses of `as any` with another more specific cast `as T`
- filled in missing typed for items that needed to be typed
  - new runtime code was added where necessary to satisfy the new types with comments
- added missing theme variable "sidebar-active" to the Theme variables
- forms using `react-hook-form` are now typechecked
- changed some instances of `target` into `currentTarget` while removing `as any` assertions

Fix keyboard focus on mobile.

Start work on roles.
Add temporary age gate.

Fix invite / friends menu having sidebars.

Add icon stacking mask.

Can now call from friends list.

Re-design status context menu.

Add rounded corners to sidebar.

Fix strokes on home sidebar.
Add tooltips on servers.
Fix reply SVG direction.