build: improve build process and release packaging

- Add a post-build hook to compress artifacts using xz
- Include extra .xz files in the release package

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.goreleaser.yaml

@@ -71,6 +71,10 @@ builds:
     {{- else }}{{ .Arch }}{{ end }}
     {{- if .Arm }}-{{ .Arm }}{{ end }}
   no_unique_dist_dir: true
+  hooks:
+    post:
+      - cmd: xz -k -9 {{ .Path }}
+        dir: ./dist/
 
 archives:
   - format: binary
@@ -82,3 +86,12 @@ checksum:
 
 snapshot:
   name_template: "{{ incpatch .Version }}"
+
+release:
+  # You can add extra pre-existing files to the release.
+  # The filename on the release will be the last part of the path (base).
+  # If another file with the same name exists, the last one found will be used.
+  #
+  # Templates: allowed
+  extra_files:
+    - glob: ./**.xz