feat(billing): enable budget CLI

[scaleway-bot]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 373 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.42%. Comparing base (113811f) to head (14b018f).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/namespaces/billing/v2/billing_cli.go	0.00%	368 Missing ⚠️
internal/namespaces/billing/v2/custom.go	0.00%	3 Missing ⚠️
commands/commands.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5719      +/-   ##
==========================================
- Coverage   50.66%   50.42%   -0.25%     
==========================================
  Files         340      342       +2     
  Lines       78134    78506     +372     
==========================================
  Hits        39583    39583              
- Misses      37055    37427     +372     
  Partials     1496     1496              

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