lint(eslint): ignore pi-mono-reference and landing directories from lint

eslint.config.mjs

@@ -14,9 +14,11 @@ export default tseslint.config(
       "oldreference/**",
       "Reference/**",
       "claude-code-source-reference/**",
+      "pi-mono-reference/**",
       "boss-build/**",
       "local-release/**",
       "builtin-skills/**",
+      "landing/**",
       "node_modules/**",
       "**/node_modules/**",
       ".next/**",