feedback7 G-TOOLS: tools/ci.mjs and npm run ci run the CI checks locally (PR #367 by @anAtheist987)

Applied as-is. tools/ci.mjs runs the checks already listed in .github/workflows/ci.yml, in that order, and skips checkout, setup-node and npm ci. Children are spawned with process.execPath, not a shell. test/ci.test.js keeps the step list, smoke script, job env and package.json scripts in step with the workflow.

Tests: node --test test/ci.test.js — 8 pass, 0 fail. npm run ci was not run (it installs and runs the suite).

package.json

@@ -38,6 +38,7 @@
     "lint": "eslint .",
     "typecheck": "tsc --noEmit --checkJs -p jsconfig.json",
     "check:imports": "node tools/check-imports.mjs",
+    "ci": "node tools/ci.mjs",
     "package": "node tools/package.mjs",
     "package:lite": "node tools/package.mjs --lite"
   },