Add Translational library similar to MSL

[baggepinnen]

This PR adds a version of the Mechanical.Translational that is more similar to the modelica versions than the two existing Mechanical.Translational and Mechanical.TranslationalPosition. There are several strong motivations for staying closer to the modelica equivalents:
The multibody library uses the Translational library, and any deviation increases the multibody implementation effort many fold, as well as making it much more likely that we introduce bugs in the process. A graphical user interface becomes similarly more difficult to implement when a translation step is required between the open standard and our implementation, for us to be able to reuse existing assets. Lastly, the burden on existing modelica users who want to transition increases if we change variable names and definitions in subtle ways, with no clear benefit.

This implementation is quite a bit lighter weight than the current TranslationalPosition due to making use of partial models in the same way modelica does.

[codecov]

Codecov Report

Merging #151 (50da17d) into main (a8428c8) will decrease coverage by 3.81%.
The diff coverage is 1.78%.

❗ Current head 50da17d differs from pull request most recent head 8c6e16a. Consider uploading reports for the commit 8c6e16a to get more accurate results

@@            Coverage Diff             @@
##             main     #151      +/-   ##
==========================================
- Coverage   63.10%   59.29%   -3.81%     
==========================================
  Files          37       40       +3     
  Lines        1713     1823     +110     
==========================================
  Hits         1081     1081              
- Misses        632      742     +110     

Impacted Files	Coverage Δ
src/Mechanical/Rotational/sources.jl	44.11% <0.00%> (-30.89%)	⬇️
src/Mechanical/TranslationalModelica/components.jl	0.00% <0.00%> (ø)
src/Mechanical/TranslationalModelica/sources.jl	0.00% <0.00%> (ø)
src/Mechanical/TranslationalModelica/utils.jl	0.00% <0.00%> (ø)
src/Mechanical/Rotational/utils.jl	75.00% <28.57%> (-8.73%)	⬇️

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