feat(python): add ruff language server for lint, format and organize imports (#859)

In projects configured for Ruff (ruff.toml, .ruff.toml, or pyproject.toml with a [tool.ruff] table), ruff server runs next to basedpyright as a managed pip tool: its lint diagnostics, Reformat Code / format on save, Optimize Imports and Code Cleanup's fix-all. It is listed after the type checkers, so hover, navigation and rename stay with them; projects without a Ruff configuration never start or install it. Root markers accept file#table to require a TOML table, and a hand-defined server named ruff now only overrides how the built-in one launches. Verified with the real-servers end-to-end test against ruff and basedpyright.

Co-authored-by: andreabasile <[email protected]>

src/features/tools/ServerSettings.tsx

@@ -553,7 +553,7 @@ export function NewServerDialog({
   const [commandLine, setCommandLine] = useState("");
   const [name, setName] = useState<string | null>(null);
   const [languages, setLanguages] = useState<string[]>([]);
-  // "ruff server": the executable, then its arguments.
+  // "pylyzer --server": the executable, then its arguments.
   let words: string[] = [];
   let quoteError: string | null = null;
   try {
@@ -600,7 +600,7 @@ export function NewServerDialog({
             autoFocus
             className={styles.grow}
             value={commandLine}
-            placeholder="ruff server"
+            placeholder="pylyzer --server"
             onChange={(e) => setCommandLine(e.target.value)}
           />
           <IconButton

src/platform/locales/textCatalog.test.ts

@@ -216,8 +216,8 @@ const UNTRANSLATED = new Set<string>([
   "NAME=value; OTHER=value",
   "node_modules/typescript",
   "PascalCase",
+  "pylyzer --server",
   "pyproject.toml, .git",
-  "ruff server",
   "run pytest",
   "snake_case",
   "tests",