Improve Geometry class string representations

[jwagenet]

Improve and make consistent string representations for Vector, Location, Axis, and Plane.
All classes now follow format:

ax = Axis((1.11, 2.22, 3.33), (4.44, 5.55, 6.66))
str(ax): "Axis: (position=(1.11, 2.22, 3.33), direction=(0.455842, 0.569803, 0.683763))"
repr(ax): "Axis((1.11, 2.22, 3.33), (0.45584230583855184, 0.5698028822981898, 0.6837634587578277))"

Changes

• Add __format__ for Vector to simplify formatting Vector tuples
• __repr__ follows format class_name(attribute1, attribute2, ...) where float format is .13g (previously used for Vector). repr() is intended to explicitly reproduce the class if executed
• __str__ follows format class_name: ("attribute1"=attribute1, "attribute2"=attribute2, ...) where float format is .6g (TOL_DIGITS)
• Use .6g for Vector formats in show_topology
• Correct Location kwarg names and make docstrings more concise
  • Explicitly position, direction, angle constructor in branches

Resolves #1104

[jwagenet]

I'm not married to .6g precision for str and .13g precision for repr. I think both could be smaller, especially repr, since effective precision is generally limited by TOLERANCE

[codecov]

Codecov Report

❌ Patch coverage is 97.72727% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.34%. Comparing base (20854b3) to head (17b1bd8).
⚠️ Report is 77 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/build123d/geometry.py	97.61%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1160      +/-   ##
==========================================
- Coverage   96.59%   96.34%   -0.26%     
==========================================
  Files          34       34              
  Lines       11118    11421     +303     
==========================================
+ Hits        10739    11003     +264     
- Misses        379      418      +39     

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