feat: add team feature flag (#915)

## Description

Add the ability to feature flag the teams feature via UI.

Also added minor UI changes

## Checklist

- [X] I have tested these changes locally and they work as expected.
- [X] I have added/updated tests that prove the effectiveness of these
changes.
- [X] I have followed the project's coding style guidelines.

apps/web/src/components/(dashboard)/layout/mobile-navigation.tsx

@@ -47,7 +47,7 @@ export const MobileNavigation = ({ isMenuOpen, onMenuOpenChange }: MobileNavigat
   return (
     <Sheet open={isMenuOpen} onOpenChange={onMenuOpenChange}>
       <SheetContent className="flex w-full max-w-[400px] flex-col">
-        <Link href="/" className="z-10" onClick={handleMenuItemClick}>
+        <Link href="/" onClick={handleMenuItemClick}>
           <Image
             src={LogoImage}
             alt="Documenso Logo"