ci: add Gitea workflows and goreleaser config

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.goreleaser.yaml

@@ -0,0 +1,29 @@
+version: 2
+project_name: docs
+
+builds:
+  - id: docs
+    main: ./cmd/docs
+    binary: docs
+    env:
+      - CGO_ENABLED=0
+    goos: [darwin, linux]
+    goarch: [amd64, arm64]
+    flags: [-trimpath]
+    ldflags: [-s -w]
+
+archives:
+  - formats: [tar.gz]
+    name_template: "docs_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+
+checksum:
+  name_template: checksums.txt
+
+gitea_urls:
+  api: https://gitea.auvem.com/api/v1
+  download: https://gitea.auvem.com
+
+release:
+  gitea:
+    owner: corestack
+    name: go