ci: remove woodpecker, using Gitea Actions

.woodpecker.yml

@@ -1,21 +0,0 @@
-when:
-  branch: [main, high-performance]
-  event: push
-
-steps:
-  - name: build-and-push
-    image: registry.nxtgauge.com/kaniko:2.1.1
-    settings:
-      registry:
-        from_secret: REGISTRY_HOSTPORT
-      insecure: true
-      username:
-        from_secret: REGISTRY_USERNAME
-      password:
-        from_secret: REGISTRY_PASSWORD
-      repo: nxtgauge-ai-assistant
-      tags:
-        - ${CI_COMMIT_SHA}
-        - ${CI_COMMIT_BRANCH}-latest
-      dockerfile: Dockerfile
-      context: .