* rename 'web app tutorials' to 'web app demos'
* replace auth helper with server-side auth
* add more descriptive instructions
* fix small typos
* create a section on supabase utitlies
* update middleware section to include utilities
* update supabase auth ui to include the utilities
* add a login/signup form
* replace supabase auth ui section with a note
* update PCKE section to use /auth/confirm route instead of /auth/callback
* update Account Page section to use utilities and switch locations
* update Sign out section to use utilities
* update bonus section to include utilities
* minor fixes
* Apply suggestions from code review
* format
* format
* fix js examples
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Co-authored-by: Charis <26616127+charislam@users.noreply.github.com>