ci: supersede #367 with combined tiered PR pipeline redesign (#369)

* ci: streamline PR pipeline gates

* test: annotate ci-test-scope stderr assertions for lint rule

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Co-authored-by: Colin <colin@solvely.net>

package.json

@@ -69,6 +69,7 @@
     "lint:pr-checks": "node scripts/lint-pr-check-project-dir.cjs",
     "lint:changeset": "node scripts/changeset/lint.cjs",
     "lint:docs": "node scripts/lint-docs-required.cjs",
+    "ci:test-scope": "node scripts/ci-test-scope.cjs",
     "changeset": "node scripts/changeset/new.cjs",
     "changelog:render": "node scripts/changeset/cli.cjs render",
     "test": "node scripts/run-tests.cjs",