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>

pnpm-workspace.yaml

@@ -0,0 +1,32 @@
+packages: [.] # workaround for https://github.com/SukkaW/nolyfill/issues/119
+savePrefix: ''
+dedupePeerDependents: false
+updateNotifier: false
+strictDepBuilds: false
+minimumReleaseAge: 0
+
+peerDependencyRules:
+  allowedVersions:
+    eslint-plugin-github>eslint: '>=9'
+
+overrides:
+  array-includes: npm:@nolyfill/array-includes@^1
+  array.prototype.findlastindex: npm:@nolyfill/array.prototype.findlastindex@^1
+  array.prototype.flat: npm:@nolyfill/array.prototype.flat@^1
+  array.prototype.flatmap: npm:@nolyfill/array.prototype.flatmap@^1
+  es-aggregate-error: npm:@nolyfill/es-aggregate-error@^1
+  hasown: npm:@nolyfill/hasown@^1
+  is-core-module: npm:@nolyfill/is-core-module@^1
+  object.assign: npm:@nolyfill/object.assign@^1
+  object.fromentries: npm:@nolyfill/object.fromentries@^1
+  object.groupby: npm:@nolyfill/object.groupby@^1
+  object.values: npm:@nolyfill/object.values@^1
+  safe-buffer: npm:@nolyfill/safe-buffer@^1
+  safe-regex-test: npm:@nolyfill/safe-regex-test@^1
+  safer-buffer: npm:@nolyfill/safer-buffer@^1
+  string.prototype.includes: npm:@nolyfill/string.prototype.includes@^1
+  string.prototype.trimend: npm:@nolyfill/string.prototype.trimend@^1
+  object-keys: npm:@nolyfill/object-keys@^1
+  object.entries: npm:@nolyfill/object.entries@^1
+  abab: npm:@nolyfill/abab@^1
+  es-set-tostringtag: npm:@nolyfill/es-set-tostringtag@^1