Update docs and examples

[ramya18101]

🔧 Changes

Improved docs to provide more context on how to configure a custom-email-provider and use auth0_action to create the prerequisite action resource.

📚 References

🔬 Testing

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.19%. Comparing base (08143bf) to head (447541a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1143   +/-   ##
=======================================
  Coverage   89.19%   89.19%           
=======================================
  Files         134      134           
  Lines       18419    18419           
=======================================
  Hits        16428    16428           
  Misses       1409     1409           
  Partials      582      582           

Files with missing lines	Coverage Δ
internal/auth0/action/resource_trigger_action.go	78.53% <100.00%> (-0.12%)	⬇️
internal/auth0/client/resource.go	98.53% <100.00%> (+<0.01%)	⬆️