List available transforms if no name is provided

[ogenstad]

Fixes #140

@wvandeun, did you have some other solution in mind? We could also return an error if you used this command without a name and didn't specify "--list".

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
infrahub_sdk/ctl/cli_commands.py	0.00%	0 Missing and 1 partial ⚠️

@@           Coverage Diff            @@
##           develop     #141   +/-   ##
========================================
  Coverage    65.40%   65.40%           
========================================
  Files           76       76           
  Lines         6923     6923           
  Branches      1367     1367           
========================================
  Hits          4528     4528           
  Misses        2026     2026           
  Partials       369      369           

Flag	Coverage Δ
python-3.10	44.40% <0.00%> (ø)
python-3.11	44.40% <0.00%> (ø)
python-3.12	44.40% <0.00%> (ø)
python-3.9	43.52% <0.00%> (ø)
python-filler-3.12	23.84% <0.00%> (ø)

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Files with missing lines	Coverage Δ
infrahub_sdk/ctl/cli_commands.py	44.89% <0.00%> (ø)