Add command modules and tests; commit remaining changes

src/commands/webhook.ts

@@ -0,0 +1,27 @@
+import type { CliDeps, RuntimeEnv } from "../index.js";
+
+export async function webhookCommand(
+	opts: {
+		port: string;
+		path: string;
+		reply?: string;
+		verbose?: boolean;
+		yes?: boolean;
+	},
+	deps: CliDeps,
+	runtime: RuntimeEnv,
+) {
+	const port = Number.parseInt(opts.port, 10);
+	if (Number.isNaN(port) || port <= 0 || port >= 65536) {
+		throw new Error("Port must be between 1 and 65535");
+	}
+	await deps.ensurePortAvailable(port);
+	const server = await deps.startWebhook(
+		port,
+		opts.path,
+		opts.reply,
+		Boolean(opts.verbose),
+		runtime,
+	);
+	return server;
+}