DXCDT-538: Adding progress spinner to tf generate command

[willvedd]

🔧 Changes

The auth0 tf generate command has the potential to take quite a long time. There are two main steps that are the culprits: fetching relevant data from Auth0 and then facilitating the generation/import with Terraform itself. This PR adds two spinners for these two steps to indicate to the user that progress is being made.

🔬 Testing

Manual verification.

📝 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

Patch coverage has no change and project coverage change: -0.05% ⚠️

Comparison is base (da61765) 72.52% compared to head (8e435d6) 72.47%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #838      +/-   ##
==========================================
- Coverage   72.52%   72.47%   -0.05%     
==========================================
  Files          91       91              
  Lines       11766    11773       +7     
==========================================
  Hits         8533     8533              
- Misses       2727     2734       +7     
  Partials      506      506              

Files Changed	Coverage Δ
internal/cli/terraform.go	60.32% <0.00%> (-1.40%)	⬇️

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