Add ruff for linting, remove flake8, remove isort, remove pylint

[gsheni]

• Added ruff for running linting
• Added ruff commands to Makefile
• Removed flake8 as dev dependency, since ruff does this, but faster
• Remove isort as dev dependency, since ruff has the same function, but faster
• Removed pylint as dev dependency, since ruff has more implemented rules
• Removed setup.cfg
• Closes Switch to using ruff for Python linting and code formatting #88

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 82.35294% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 79.12%. Comparing base (ed3645b) to head (e4957e7).

❗ Current head e4957e7 differs from pull request most recent head 42f595f. Consider uploading reports for the commit 42f595f to get more accurate results

Files	Patch %	Lines
deepecho/sequences.py	22.22%	7 Missing ⚠️
deepecho/models/base.py	28.57%	5 Missing ⚠️
deepecho/models/basic_gan.py	91.30%	2 Missing ⚠️
deepecho/demo.py	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
- Coverage   79.39%   79.12%   -0.28%     
==========================================
  Files           7        7              
  Lines         728      728              
==========================================
- Hits          578      576       -2     
- Misses        150      152       +2     

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