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>

Dockerfile

@@ -3,7 +3,7 @@
 FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.26-alpine3.23 AS frontend-build
 RUN apk --no-cache add build-base git nodejs pnpm
 WORKDIR /src
-COPY package.json pnpm-lock.yaml .npmrc ./
+COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
 RUN --mount=type=cache,target=/root/.local/share/pnpm/store pnpm install --frozen-lockfile
 COPY --exclude=.git/ . .
 RUN make frontend