chore: Add tofu plan workflow

.forgejo/workflows/tofu-plan.yaml

@@ -0,0 +1,35 @@
+---
+name: tofu plan
+on:
+  workflow_dispatch:
+  workflow_call:
+  pull_request:
+    branches:
+      - main
+    # paths:
+    #   - pve01.wheatley.in/k8s-whealtey/**
+
+jobs:
+  opentofu:
+    runs-on: docker
+    steps:
+    - uses: actions/checkout@v4
+    - uses: opentofu/setup-opentofu@v1
+
+    - name: OpenTofu fmt
+      id: fmt
+      run: tofu fmt -check
+      continue-on-error: true
+
+    - name: OpenTofu Init
+      id: init
+      run: tofu init
+
+    - name: OpenTofu Validate
+      id: validate
+      run: tofu validate -no-color
+
+    - name: OpenTofu Plan
+      id: plan
+      run: tofu plan -no-color
+      continue-on-error: true