Add Gitea act-runner and test actions for the repo

.gitea/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  terraform-validate:
+    name: Terraform fmt + validate
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: hashicorp/setup-terraform@v3
+
+      - name: fmt check — 1-nixos-node
+        run: terraform fmt -check -recursive
+        working-directory: 1-nixos-node
+
+      - name: fmt check — 2-nomad-config
+        run: terraform fmt -check -recursive
+        working-directory: 2-nomad-config
+
+      - name: validate — 2-nomad-config (no backend)
+        run: |
+          terraform init -backend=false
+          terraform validate
+        working-directory: 2-nomad-config