[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[bot]]

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 :warning:
netneurotools/metrics.py	0.00%	1 Missing :warning:
netneurotools/plotting.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ 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 ```

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