ci: run perf and website deploy when packages/core changes

[MarkAlex1234]

Commit 1 (the fix). Two workflows depend on @gitwand/core but don't watch packages/core/**:

• perf.yml explicitly runs pnpm --filter @gitwand/core run build before the desktop parity probe, and apps/desktop depends on @gitwand/core (workspace:*). But it only triggers on apps/desktop/**, so a resolver change in core, the thing most likely to move performance, never runs the perf check.
• deploy-website.yml: the website depends on @gitwand/core (workspace:*) and imports it in .vitepress/config.ts and theme/tools/index.ts. A core change merged to main doesn't redeploy the site until something under website/ changes.

This adds packages/core/** to perf.yml (push and pull_request) and to deploy-website.yml (push). Three lines.

Commit 2 (optional). This adds .github/workflows/path-filter-audit.yml, a small pull_request job that warns when a workflow's paths: stops covering the workspace packages its app depends on. It keeps these lists from drifting again. It only annotates and never fails the build; drop the commit if you'd rather not add a workflow.

On main today it reports exactly these three gaps, for example: "packages/core/** is missing from on.pull_request.paths: @gitwand/desktop depends on @gitwand/core, so a change there skips this workflow." With commit 1 applied, it reports none.

Disclosure: the audit is a GitHub Action I maintain, dynamic-monorepo.

Verification: all workflow YAML parses, and I ran the audit locally (npx github:Continuous-Actions/dynamic-monorepo audit) before and after: 3 findings, then 0.

[devlint]

Thanks — the path additions are right: perf.yml already builds @gitwand/core before the parity probe, and the website imports it.

I pushed two commits to this branch: a revert of the path-filter-audit workflow (we keep third-party actions out of CI, and @v1 is a mutable ref), and a one-line update of the comment at the top of perf.yml so it mentions packages/core/. Both workflow files parse; the remaining diff is the original three-line fix.

[devlint]

Thanks @MarkAlex1234 — good catch on the path filters: core changes now run the perf check and redeploy the site. We kept the three-line fix and left the audit workflow out (we avoid third-party actions in CI), as noted in the review. Shipped with v3.12.0, released today. 🙏