sh1pt: install Node pnpm Test (node-pnpm-test@1.1.0) (#5)

* Add .github/workflows/test.yml via sh1pt node-pnpm-test@1.1.0

* Convert test workflow to Go (go test ./...)

agentbbs is a Go project (go.mod, go 1.26); the Node/pnpm workflow could
never pass here — pnpm/action-setup found no packageManager. Replace with
go test ./... and trigger on main (was master-only). Build/vet live in ci.yml.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: sh1pt-actions-fleet[bot] <287014002+sh1pt-actions-fleet[bot]@users.noreply.github.com>
Co-authored-by: Anthony Ettinger <anthony@profullstack.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

.github/workflows/test.yml

@@ -0,0 +1,25 @@
+# Go tests for agentbbs. agentbbs is a Go project (see go.mod); this runs the
+# package tests on pull requests and pushes to main. Build/vet live in ci.yml.
+name: test
+
+on:
+  pull_request:
+  push:
+    branches: [main, master]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.26'
+          cache: true
+
+      - run: go test ./...