fix(turbo-gen): add local eslint config + package.json for generators dir

The IDE was reporting eslint errors on turbo/generators/config.ts and
on the generated package because there's no eslint config at the repo
root — when eslint walks up from turbo/generators/, it never finds
one. The CLI didn't surface this (eslint silently exited fine on
files it couldn't config), but the IDE eslint daemon did.

- turbo/generators/eslint.config.js extends @repo/core-eslint/base
  and ignores templates/** (the .hbs partials contain {{...}}
  placeholders that aren't valid TS — never lint them).
- turbo/generators/package.json declares "type": "module" so Node
  doesn't warn about CJS-vs-ESM ambiguity when loading the eslint
  config.

Verified end-to-end:
- `npx eslint . -p tsconfig.json` clean in turbo/generators/.
- `pnpm turbo gen feature --args widgets Widget widgets` →
  pnpm install → @repo/widgets passes lint, typecheck, and 25/25
  tests across 9 files.
- packages/widgets cleaned up before commit; not checked in.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

turbo/generators/eslint.config.js

@@ -0,0 +1,13 @@
+import baseConfig from "@repo/core-eslint/base";
+
+export default [
+  ...baseConfig,
+  {
+    // Templates are Handlebars partials emitted by the generator. They
+    // contain {{...}} placeholders that aren't valid TypeScript on their
+    // own, so they MUST NOT be linted as TS. The .hbs extension also
+    // already isn't picked up by eslint by default — this is belt-and-
+    // suspenders for IDE eslint daemons that scan by directory.
+    ignores: ["templates/**"],
+  },
+];

turbo/generators/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "@repo/turbo-generators",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module"
+}