Add automatic build version generation from git

Implement a script to automatically generate build version information from git commit hash and date, updating version.json and creating latest.json.

package.json

@@ -4,6 +4,8 @@
   "license": "MIT",
   "scripts": {
     "preinstall": "sh -c 'rm -f package-lock.json yarn.lock; case \"$npm_config_user_agent\" in pnpm/*) ;; *) echo \"Use pnpm instead\" >&2; exit 1 ;; esac'",
+    "update-version": "node scripts/update-version.mjs",
+    "prebuild": "pnpm run update-version",
     "build": "pnpm run typecheck && pnpm -r --if-present run build",
     "typecheck:libs": "tsc --build",
     "typecheck": "pnpm run typecheck:libs && pnpm -r --filter \"./artifacts/**\" --filter \"./scripts\" --if-present run typecheck",