chore: exclude .claude from eslint and prettier

The agent tooling checks out full repo copies (including tsconfigs)
under .claude/worktrees/. Linting them made typescript-eslint report
"multiple candidate TSConfigRootDirs" and fail the whole run.

AI-Assisted-By: Claude Code

Author: d-biehl

.prettierignore

@@ -15,4 +15,7 @@ vscode.proposed.d.ts
 .pytest_cache/
 robotcode/
 
+# agent tooling checks out full repo copies here
+.claude/
+
 *.md

eslint.config.mjs

@@ -7,6 +7,9 @@ export default [
     ignores: [
       "**/.venv/",
       "**/node_modules/",
+      // Agent tooling checks out full repo copies (incl. tsconfigs) under .claude/worktrees/;
+      // linting them confuses typescript-eslint's root-dir resolution for the whole run.
+      "**/.claude/",
       "**/dist/",
       "**/out/",
       "**/coverage/",