[MNT] Update package structure

[liuzhenqi77]

Updating Python package settings and others

• (Major change) replace setup.cfg with pyprojects.toml following best practices
• update versioneer
• replace flake8 with ruff
• add GH Actions for docker release
• add GH Actions for switching netneurotools docs to github pages
• update minimum required Python version to 3.8
• ...

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (2add592) 55.70% compared to head (d1f81a2) 0.00%.
Report is 2 commits behind head on master.

Files	Patch %	Lines
netneurotools/stats.py	0.00%	4 Missing ⚠️
netneurotools/metrics.py	0.00%	1 Missing ⚠️
netneurotools/plotting.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #128       +/-   ##
==========================================
- Coverage   55.70%   0.00%   -55.71%     
==========================================
  Files          26      17        -9     
  Lines        2391    2028      -363     
==========================================
- Hits         1332       0     -1332     
- Misses       1059    2028      +969     

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