build: set up versioning with semantic-release

scripts/update-manifest-version.js

@@ -0,0 +1,14 @@
+const fs = require("fs");
+const path = "./manifest.json";
+
+const version = process.env.npm_package_version;
+if (!version) {
+    console.error("Version not found in npm_package_version.");
+    process.exit(1);
+}
+
+const manifest = JSON.parse(fs.readFileSync(path, "utf8"));
+manifest.version = version;
+fs.writeFileSync(path, JSON.stringify(manifest, null, 2));
+
+console.log(`Updated manifest.json to version ${version}`);