[ci skip] Add Woodpecker CI stack (WIP) and claude agents

- Add stacks/woodpecker/ with Helm-based deployment config
- Add .woodpecker/ CI pipeline configs (default, build-cli, renew-tls)
- Add NFS export entry for woodpecker
- Add .claude/agents/ definitions

.woodpecker/build-cli.yml

@@ -0,0 +1,22 @@
+when:
+  event: push
+
+clone:
+  git:
+    image: alpine
+    commands:
+      - "apk update && apk add git"
+      - "for i in 1 2 3 4 5; do git clone https://github.com/ViktorBarzin/infra.git . && break || echo \"Clone attempt $i failed, retrying in 10s...\" && sleep 10; done"
+      - "git checkout $CI_COMMIT_SHA"
+
+steps:
+  - name: build-image
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      username: "viktorbarzin"
+      password:
+        from_secret: dockerhub-pat
+      repo: viktorbarzin/infra
+      dockerfile: cli/Dockerfile
+      context: cli
+      auto_tag: true