сhore(lint): migrate linting from flake8/isort/black to ruff

- Remove config files: .flake8, .isort.cfg, pyproject.toml
- Uninstall dependencies: black, flake8, isort, requirements\flake8-plugins.txt

Author: RandomProgramm3r

.flake8

@@ -1,7 +1,4 @@
 -r prod.txt
 -r test.txt
-black==24.8.0
-flake8==7.1.1
-isort==5.13.2
 ruff==0.11.5
-sort-requirements==1.3.0
+sort-requirements==1.3.0

.isort.cfg

@@ -1,3 +1,2 @@
--r flake8-plugins.txt
 django-debug-toolbar==4.4.6
 parameterized==0.9.0