Build multiple file types in one go

Currently if we want to output an STL, a STEP and a GLB we have to run all cq-cli 3 times. However as `main.py` runs cadquery to get the build result and then passes it into the codec, it would be possible just to repeat the codec step which should add some speed.

I can imagine semicolon separating should work:

cq-cli --infile /input/path/script.py --outfile /output/path/newfile.step;/output/path/newfile.stl;/output/path/newfile.glb

If the user specifically wanted to set codecs it could be a list that needs to be the same length

cq-cli --codec step;stl;glb --infile /input/path/script.py --outfile /output/path/newfile.step;/output/path/newfile.stl;/output/path/newfile.glb

Start by reading main.py and tracing how cq-cli parses --outfile and --codec after the CadQuery build result is produced. Verify the behavior with the issue's STEP, STL, and GLB examples; done means one invocation supports multiple outputs without repeating the CadQuery build.

Vom Indexierungsmodell aus dem Issue-Text verfasst.