Add basic desktop UI - systray

This PR adds a basic UI for desktop
applications that support Linux, Max
and Windows.

.goreleaser_ui_darwin.yaml

@@ -0,0 +1,38 @@
+project_name: wiretrustee-ui
+builds:
+  - id: wiretrustee-ui-darwin
+    dir: client/ui
+    binary: wiretrustee-ui
+    env: [CGO_ENABLED=1]
+
+    goos:
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    gomips:
+      - hardfloat
+      - softfloat
+    ldflags:
+      - -s -w -X github.com/wiretrustee/wiretrustee/client/ui/system.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.CommitDate}} -X main.builtBy=goreleaser
+    mod_timestamp: '{{ .CommitTimestamp }}'
+    tags:
+      - load_wgnt_from_rsrc
+
+archives:
+  - builds:
+      - wiretrustee-ui-darwin
+
+brews:
+  -
+    tap:
+      owner: wiretrustee
+      name: homebrew-client-ui
+      token: "{{ .Env.HOMEBREW_TAP_GITHUB_TOKEN }}"
+    commit_author:
+      name: Wiretrustee
+      email: wiretrustee@wiretrustee.com
+    description: Wiretrustee project.
+    download_strategy: CurlDownloadStrategy
+    homepage: https://wiretrustee.com/
+    license: "BSD3"