Add support for component's category attribute

[m-aciek]

Proposed changes

Expose component's category attribute in the Python API.

Checklist

• Lint and unit tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works.
• [ ] I have added documentation to describe my feature.
• I have squashed my commits into logic units.
• I have described the changes in the commit messages.

[codecov]

Codecov Report

Merging #471 (e36f5f6) into main (c83a9a5) will decrease coverage by 0.12%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #471      +/-   ##
==========================================
- Coverage   98.97%   98.86%   -0.12%     
==========================================
  Files           6        6              
  Lines        1655     1669      +14     
  Branches      217      217              
==========================================
+ Hits         1638     1650      +12     
- Misses          8       10       +2     
  Partials        9        9              

Files Changed	Coverage
wlc/test_base.py	ø
wlc/__init__.py	100.00%
wlc/test_wlc.py	100.00%

[nijel]

Merged, thanks for your contribution!