feat(atlassian): implement milestone M1 - scaffold skill and shared runtime

skills/atlassian/shared/scripts/tests/cli-help.test.ts

@@ -0,0 +1,14 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+
+test("CLI help prints the Atlassian skill banner", () => {
+  const result = spawnSync("pnpm", ["exec", "tsx", "src/cli.ts", "--help"], {
+    cwd: new URL("../", import.meta.url),
+    encoding: "utf8",
+  });
+
+  assert.equal(result.status, 0, result.stderr);
+  assert.match(result.stdout, /Portable Atlassian CLI for multi-agent skills/);
+  assert.match(result.stdout, /Usage:/);
+});