Add stale bot

[juancarlospaco]

What kind of change does this PR introduce?

• Add stale bot to mark issues and PRs as Stale after a long period of inactivity.
• Currently, it does NOT close issues automatically, but it can do so if wanted.
• Same yaml as Add stale bot supabase-py#774

Additional context

• https://github.com/actions/stale

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.21%. Comparing base (a809e98) to head (ce4c7cf).
Report is 24 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #92   +/-   ##
=======================================
  Coverage   85.21%   85.21%           
=======================================
  Files           7        7           
  Lines         115      115           
=======================================
  Hits           98       98           
  Misses         17       17           

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