fix(config): update ruff configuration to modern format

Move ruff linting configuration from deprecated top-level settings
to the new [tool.ruff.lint] section to resolve deprecation warnings.

pyproject.toml

@@ -131,6 +131,16 @@ exclude_lines = [
 [tool.ruff]
 line-length = 88
 target-version = "py310"
+exclude = [
+    ".git",
+    "__pycache__",
+    "docs",
+    "build",
+    "dist",
+    ".venv",
+]
+
+[tool.ruff.lint]
 select = [
     "E",   # pycodestyle errors
     "W",   # pycodestyle warnings
@@ -144,14 +154,6 @@ ignore = [
     "E203", # whitespace before ':'
     "E501", # line too long (handled by black)
 ]
-exclude = [
-    ".git",
-    "__pycache__",
-    "docs",
-    "build",
-    "dist",
-    ".venv",
-]
 
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 "__init__.py" = ["F401"]  # Allow unused imports in __init__.py