get_components + get_available_components docstrings

[kdayday]

The filter function method signature for get_components was not visible in the API.

• Split up the get_components docstring & examples into 2 docstrings, with or without filter
• Clarified get_available_components
• Renamed Type Hierarchy page to Type Tree to disambiguate

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.37%. Comparing base (8097e9b) to head (c7fcef0).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1206      +/-   ##
==========================================
- Coverage   84.52%   84.37%   -0.16%     
==========================================
  Files         181      181              
  Lines        8389     8382       -7     
==========================================
- Hits         7091     7072      -19     
- Misses       1298     1310      +12     

Flag	Coverage Δ
unittests	84.37% <ø> (-0.16%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/base.jl	88.87% <ø> (-0.48%)	⬇️

... and 7 files with indirect coverage changes