Terraform generate: check if email provider exists

[willvedd]

🔧 Changes

Adding a check to confirm that an email provider is configured for an Auth0 tenant before attempting to generate its configuration via the auth0 tf generate command. Otherwise, during the terraform plan or terraform apply, the following error will occur:

Error: Import block target does not exist
│ 
│   on auth0_import.tf line 5:
│    5: import {

🔬 Testing

Added unit tests and manually verified.

📝 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 lines are covered by tests ✅

Comparison is base (c2826ae) 73.36% compared to head (2b4fa06) 73.38%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #857      +/-   ##
==========================================
+ Coverage   73.36%   73.38%   +0.01%     
==========================================
  Files          92       92              
  Lines       11876    11883       +7     
==========================================
+ Hits         8713     8720       +7     
  Misses       2647     2647              
  Partials      516      516              

Files	Coverage Δ
internal/auth/scopes.go	100.00% <ø> (ø)
internal/auth0/auth0.go	100.00% <100.00%> (ø)
internal/cli/terraform.go	87.17% <100.00%> (ø)
internal/cli/terraform_fetcher.go	98.08% <100.00%> (+0.03%)	⬆️

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