Use uv for dev and CI environments

[guarin]

Changes

• Use uv for dev and CI environments
• Make library compatible with torch 1.10, torchvision 0.11, and pytorch lightning 1.6
• Add optional matplotlib dependency
• Remove unused minimal dependencies
• Only import from numpy.typing when type checking to keep backwards compatibility with old numpy versions

This PR does not change the minimal required dependencies to use the package. In the future we should make a breaking change that moves the torch, torchvision, and pytorch lightning dependencies from minimal to the main dependencies.

The PR contains quite a lot of smaller changes that were necessary to get everything working using uv and CI. I left comments to explain the changes.

This PR also fixes the issue regarding numpy versions from #1490

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 12 lines in your changes missing coverage. Please review.

Project coverage is 84.71%. Comparing base (898c171) to head (ae70b5b).

Files	Patch %	Lines
lightly/loss/wmse_loss.py	57.14%	3 Missing ⚠️
lightly/utils/embeddings_2d.py	0.00%	3 Missing ⚠️
lightly/utils/debug.py	0.00%	2 Missing ⚠️
lightly/api/api_workflow_selection.py	75.00%	1 Missing ⚠️
lightly/embedding/embedding.py	75.00%	1 Missing ⚠️
lightly/models/utils.py	0.00%	1 Missing ⚠️
lightly/utils/io.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1625      +/-   ##
==========================================
- Coverage   85.70%   84.71%   -1.00%     
==========================================
  Files         150      150              
  Lines        6387     6403      +16     
==========================================
- Hits         5474     5424      -50     
- Misses        913      979      +66     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.