ci: build and release webdrop-api and webdrop-files as separate images [CI]

- dev images are built only when the push touched code that image uses (path filters);
  webdrop-files does not wait for the frontend build
- one v* tag releases both images (:tag and :latest) after the shared checks
- registry build and push live in scripts/ci-publish-image.sh, used by every workflow
- containers: fix the api Containerfile (missing Sync project), add Containerfile.files,
  Quadlet units for the file service (prod and dev), env examples, and registry
  auto-update for the production units so each machine pulls only the image it runs

.woodpecker/dev-image-api.yml

@@ -0,0 +1,51 @@
+# 主后端(含内嵌前端)的开发镜像:提交信息带 [CI],并且这次推送改到了主后端用到的代码时才构建。
+# 推送 webdrop-api:dev(开发机器的 podman auto-update 跟踪它)和 webdrop-api:dev-<提交>
+when:
+  - event: push
+    branch: [master, main]
+    evaluate: 'CI_COMMIT_MESSAGE contains "[CI]"'
+    path:
+      include:
+        - 'web/**'
+        - 'packages/core/**'
+        - 'server/Containerfile'
+        - 'server/Directory.Build.props'
+        - 'server/src/WebDrop.Api/**'
+        - 'server/src/WebDrop.Core/**'
+        - 'server/src/WebDrop.Storage/**'
+        - 'server/src/WebDrop.Frontend/**'
+        - 'server/src/WebDrop.FileProtocol/**'
+        - 'server/src/WebDrop.Sync/**'
+        - 'scripts/ci-publish-image.sh'
+        - '.woodpecker/dev-image-api.yml'
+  - event: manual
+
+labels:
+  ci: domain-linux-native
+  platform: linux/amd64
+
+clone:
+  - name: git
+    image: woodpeckerci/plugin-git:2.9.3
+    settings:
+      remote:
+        from_secret: gitea_clone_webdrop
+      lfs: false
+
+depends_on:
+  - ci
+  - web-build
+
+concurrency: 1
+
+steps:
+  publish-dev-image:
+    image: bash
+    environment:
+      ZOT_USERNAME: justme
+      ZOT_SECRET:
+        from_secret: zot_secret
+      ZOT_REGISTRY: registry.oeo.one
+    commands:
+      - sha="${CI_COMMIT_SHA:0:7}"
+      - bash scripts/ci-publish-image.sh webdrop-api server/Containerfile "dev-$sha" dev