add e2e test

.github/workflows/test-e2e.yaml

@@ -0,0 +1,53 @@
+---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+name: Test E2E
+
+on:
+  # Manual Trigger
+  workflow_dispatch: {}
+
+  # Run on any PR that changes this pipeline or that should ultimately trigger a release when merged
+  pull_request:
+    paths:
+      - ".github/workflows/test.yaml"
+      - "go.mod"
+      - "go.sum"
+      - "**/**.go"
+
+env:
+  TALOSCONFIG_DIR: ./configs/
+  TALSWITCHER_LOG_LEVEL: debug
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+
+      - name: Build `talswitcher`
+        run: go build -o talswitcher
+
+      - name: Install `talosctl`
+        run: curl -sL https://talos.dev/install | sh
+
+      - name: Set Up Talos Clusters
+        run: |
+          talosctl cluster create --name=test-cluster-1 --talosconfig=./configs/talos1.yaml --cidr=10.5.0.0/24 &
+          talosctl cluster create --name=test-cluster-2 --talosconfig=./configs/talos2.yaml --cidr=10.6.0.0/24 &
+          wait
+
+      - name: Run talswitcher - switch to cluster 1
+        run: ./talswitcher test-cluster-1
+
+      - name: List Talos Members
+        run: talosctl get members -n test-cluster-1-controlplane-1
+
+      - name: Run talswitcher - switch to cluster 2
+        run: ./talswitcher test-cluster-2
+
+      - name: List Talos Members
+        run: talosctl get members -n test-cluster-2-controlplane-1
+
+      - name: Try to List Members of Cluster 1
+        run: talosctl get members -n test-cluster-1-controlplane-1 && exit 1 || echo "This was supposed to fail!"