fix: improve CLI error handling and user guidance

- Add Node.js >= 22 runtime version check before any imports
- Add EADDRINUSE error handlers for HTTP and WebSocket servers
- Fix misleading 'Couldn't parse Quartz configuration' error message
- Add actionable guidance to sync/upgrade/push failure messages
- Add --concurrency validation (must be >= 1)

quartz/bootstrap-cli.mjs

@@ -1,4 +1,12 @@
 #!/usr/bin/env -S node --no-deprecation
+const [major] = process.versions.node.split(".").map(Number)
+if (major < 22) {
+  console.error(
+    `\nQuartz requires Node.js >= 22, but you are running Node.js ${process.version}.\n` +
+      `Please upgrade: https://nodejs.org/\n`,
+  )
+  process.exit(1)
+}
 import yargs from "yargs"
 import { hideBin } from "yargs/helpers"
 import {