ci: avoid installing debian dependencies

scripts/read_json.mjs

@@ -0,0 +1,12 @@
+#!/bin/env node
+/* eslint-env node */
+
+import fs from 'fs';
+
+const data = JSON.parse(fs.readFileSync(0, 'utf-8').trim());
+
+let value = data;
+for (let i = 2; i < process.argv.length; i++) {
+  value = value[process.argv[i]] ?? null;
+}
+process.stdout.write(String(value), 'utf-8');