Make TransformBy generic

[benjamaan476]

Had to force the name of the TransformBy struct to make openapi linting happy. Can now use TranformBy generically with Point3d<f32>, Point3d<LengthUnit> and Point4d

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

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Files with missing lines	Patch %	Lines
modeling-cmds/src/shared.rs	0.00%	13 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #733   +/-   ##
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  Coverage        ?   25.23%           
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  Files           ?       35           
  Lines           ?     2104           
  Branches        ?        0           
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  Hits            ?      531           
  Misses          ?     1573           
  Partials        ?        0           

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[adamchalmers]

Here's the OpenAPI schema your engine PR produces:

I don't think this #[serde(rename)] fix is going to actually produce a correct schema. It seems that the schema requires TransformBy to use T = Point3d.