Update to Woodpecker v3 pipeline format (fixes 'pipeline definition not found')

.woodpecker.yml

@@ -1,32 +0,0 @@
-# Woodpecker CI pipeline for DCOS
-# Integrates with stonks-ci (stonks-oracle's CI/CD at stonks-ci.celestium.life)
-
-steps:
-  - name: lint-and-test
-    image: python:3.12-slim
-    commands:
-      - pip install --break-system-packages ruff pytest asyncpg redis aiosqlite pyyaml
-      - ruff check src/dcos/
-      - pytest tests/test_memory/ tests/test_core/ -x --tb=short -q || true
-    when:
-      event: push
-
-  - name: build-and-push-image
-    image: plugins/docker
-    privileged: true
-    commands:
-      - docker login ghcr.io -u "${GITHUB_TOKEN}" -p "${GHCR_TOKEN}"
-      - docker build -f docker/Dockerfile.dcos -t ghcr.io/celesrenata/dcos:${CI_COMMIT_SHA} .
-      - docker push ghcr.io/celesrenata/dcos:${CI_COMMIT_SHA}
-      - docker tag ghcr.io/celesrenata/dcos:${CI_COMMIT_SHA} ghcr.io/celesrenata/dcos:latest
-      - docker push ghcr.io/celesrenata/dcos:latest
-    when:
-      event: push
-
-  - name: deploy-to-k8s
-    image: bitnami/kubectl:latest
-    commands:
-      # Deploy using runmefirst.sh (handles secrets, namespace, GHCR pull secret)
-      - bash ~/sources/kube/dcos/runmefirst.sh
-    when:
-      event: push