Revert "feat: Introduce isort and Python-based code quality tools (#446)"

This reverts commit cfe2b900c7.

The custom scripts introduced to auto-format imports (to enforce project guidelines) caused issues. Specifically, isort’s hardcoded behavior for expanded standard library imports with “as” imports led to unintended formatting. This commit reverts those changes and removes the custom scripts, restoring the project to its previous, stable state.

pyproject.toml

@@ -56,7 +56,6 @@ dev = [
   "pylint",
   "mypy",
   "pyright",
-  "isort>=5.13.2",
   # security:
   "bandit",
   # packaging:
@@ -84,8 +83,8 @@ app     = "python -m kleinanzeigen_bot"
 compile.cmd = "python -O -m PyInstaller pyinstaller.spec --clean"
 compile.env = {PYTHONHASHSEED = "1", SOURCE_DATE_EPOCH = "0"}  # https://pyinstaller.org/en/stable/advanced-topics.html#creating-a-reproducible-build
 debug   = "python -m pdb -m kleinanzeigen_bot"
-format  = "python -m scripts.format_code"
-lint    = "python -m scripts.lint_code"
+format  = "autopep8 --recursive --in-place src tests --verbose"
+lint    = {shell = "pylint -v src tests && autopep8 -v --exit-code --recursive --diff src tests && mypy" }
 audit   = "bandit -c pyproject.toml -r src"
 test    = "python -m pytest --capture=tee-sys -v"
 utest   = "python -m pytest --capture=tee-sys -v -m 'not itest'"
@@ -267,15 +266,3 @@ filterwarnings = [
   "ignore:Exception ignored in:pytest.PytestUnraisableExceptionWarning",
   "ignore::DeprecationWarning"
 ]
-
-# Add isort configuration to format imports
-[tool.isort]
-profile = "black"
-line_length = 160
-combine_as_imports = true
-combine_star = true
-multi_line_output = 3
-force_grid_wrap = 0
-ensure_newline_before_comments = true
-no_lines_before = ["LOCALFOLDER"]
-combine_straight_imports = true