Implemented cq.Vector.projectToLine() method

[A-G-D]

Added an implementation for the said method, as well as a unit test.

[codecov]

Codecov Report

Merging #835 (fcb8d30) into master (94030ad) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head fcb8d30 differs from pull request most recent head 1508f15. Consider uploading reports for the commit 1508f15 to get more accurate results

@@           Coverage Diff           @@
##           master     #835   +/-   ##
=======================================
  Coverage   95.88%   95.88%           
=======================================
  Files          32       32           
  Lines        7654     7663    +9     
  Branches      815      815           
=======================================
+ Hits         7339     7348    +9     
  Misses        186      186           
  Partials      129      129           

Impacted Files	Coverage Δ
cadquery/occ_impl/geom.py	99.57% <100.00%> (+<0.01%)	⬆️
tests/test_cad_objects.py	99.38% <100.00%> (+0.01%)	⬆️

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[A-G-D]

'*' operator for cq.Vector should now allow being used for

scaledVector = 4 * cq.Vector(1, 1, 1)

in addition to the already working

scaledVector = cq.Vector(1, 1, 1) * 4

[jmwright]

Looks good, thanks @A-G-D