fix(cubesql): Add folders to Cube Metadata

[max-kammerer]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 64.28571% with 5 lines in your changes missing coverage. Please review.

Project coverage is 82.85%. Comparing base (d8d8de2) to head (1994dcb).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...besql/cubeclient/src/models/v1_cube_meta_folder.rs	0.00%	4 Missing ⚠️
rust/cubesql/cubeclient/src/models/v1_cube_meta.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9089      +/-   ##
==========================================
+ Coverage   82.75%   82.85%   +0.09%     
==========================================
  Files         221      222       +1     
  Lines       78814    78828      +14     
==========================================
+ Hits        65220    65309      +89     
+ Misses      13594    13519      -75     

Flag	Coverage Δ
cubesql	82.85% <64.28%> (+0.09%)	⬆️

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