refactor: convert action to TS and bundle code (#95)

(cherry picked from commit 95bbb87724)

scripts/build.ts

@@ -0,0 +1,19 @@
+import { build } from "tsdown";
+import { join } from "node:path";
+
+// Ensure `deno install` has run before building
+await new Deno.Command(Deno.execPath(), {
+  args: ["install"],
+  cwd: join(import.meta.dirname!, ".."),
+  stdout: "inherit",
+  stderr: "inherit",
+}).output();
+
+await build({
+  entry: {
+    main: "src/main.ts",
+  },
+  target: "node20.19",
+  platform: "node",
+  format: "esm",
+});