feat: emit json schema in npm package

scripts/build-dxt-schema.js

@@ -0,0 +1,14 @@
+import { DxtManifestSchema } from "../src/schemas.ts";
+import * as z from "zod/v4";
+import fs from "node:fs/promises";
+import path from "node:path";
+
+const schema = z.toJSONSchema(DxtManifestSchema);
+await fs.mkdir(path.join(import.meta.dirname, "../dist"), { recursive: true });
+await fs.writeFile(
+  path.join(import.meta.dirname, "../dist", "dxt-manifest.schema.json"),
+  JSON.stringify(schema, null, 2),
+  {
+    encoding: "utf8",
+  },
+);