ci(lighthouse): move upload script into root scripts/ folder

Address review feedback from @mydea: a 70-line upload script does not
warrant its own workspace package.

- Move `dev-packages/lighthouse-bundle/bundle-and-upload.mjs` to
  `scripts/lighthouse-bundle-and-upload.mjs` alongside the other repo
  utilities (`bump-size-limits.mjs`, `ci-print-build-artifact-paths.mjs`,
  etc.).
- Drop the now-empty `dev-packages/lighthouse-bundle/` package and its
  entry in the root `workspaces` list.
- Update the nightly workflow to invoke the new path.
- Strip a stale `~/Projects/...` reference and an internal scratchpad
  pointer from the script's JSDoc header while we are in the file.

Co-Authored-By: claude-sonnet-4-5 <noreply@anthropic.com>

Author: HazAT

.github/workflows/lighthouse.yml

@@ -30,4 +30,4 @@ jobs:
       - run: yarn build:tarball
       - run: yarn test:prepare
         working-directory: dev-packages/e2e-tests
-      - run: node dev-packages/lighthouse-bundle/bundle-and-upload.mjs
+      - run: node scripts/lighthouse-bundle-and-upload.mjs

dev-packages/lighthouse-bundle/package.json

@@ -109,8 +109,7 @@
     "dev-packages/clear-cache-gh-action",
     "dev-packages/external-contributor-gh-action",
     "dev-packages/rollup-utils",
-    "dev-packages/bundler-tests",
-    "dev-packages/lighthouse-bundle"
+    "dev-packages/bundler-tests"
   ],
   "devDependencies": {
     "@rollup/plugin-commonjs": "^25.0.7",

package.json

@@ -6,9 +6,6 @@
  * the upload succeeds.
  *
  * Single-app static matrix: 1 app × 3 modes = 3 cells.
- * See plan scratchpad #182 for design details.
- *
- * Wire protocol: ~/Projects/sentry-lhci/docs/sentry-javascript-handoff.md
  *
  * Zero runtime dependencies — uses Node 22 builtins (fetch, FormData, Blob) and
  * the system `tar`. Every external command is invoked via `execFileSync` with