feat: add pre-commit workflow

- enforce pre-commit is run for all pull-requests

.woodpecker/pre-commit.yaml

@@ -0,0 +1,9 @@
+when:
+  - event: pull_request
+
+steps:
+  - name: pre-commit
+    image: git.unkin.net/unkin/almalinux9-base:latest
+    commands:
+      - dnf install uv kustomize kubeconform -y
+      - uvx pre-commit run --all-files