build: update pnpm to v11 (#37591)

Update to https://github.com/pnpm/pnpm/releases/tag/v11.0.0

- move all pnpm settings to `pnpm-workspace.yaml`, pnpm v11 only reads
that file
- drop redundant or no-op settings
- disable `strictDepBuilds` to avoid having to manually specify deps
with build scripts, this is equivalent to v10 where it will not execute
and warn.
- add workarounds for https://github.com/SukkaW/nolyfill/issues/119
- remove dead eslintrc entry

---
This PR was written with the help of Claude Opus 4.7

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

renovate.json5

@@ -85,7 +85,7 @@
       "matchManagers": ["npm"],
       "postUpgradeTasks": {
         "commands": ["make svg nolyfill"],
-        "fileFilters": ["package.json", "pnpm-lock.yaml", "public/assets/img/svg/**"],
+        "fileFilters": ["package.json", "pnpm-lock.yaml", "pnpm-workspace.yaml", "public/assets/img/svg/**"],
         "executionMode": "branch",
       },
     },