Desktop integration (#2073)

* Open stash in system tray on Windows/MacOS
* Add desktop notifications
* MacOS Bundling
* Add binary icon

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

pkg/api/favicon.go

@@ -0,0 +1,28 @@
+package api
+
+import (
+	"embed"
+	"runtime"
+)
+
+const faviconDir = "ui/v2.5/build/"
+
+type FaviconProvider struct {
+	uiBox embed.FS
+}
+
+func (p *FaviconProvider) GetFavicon() []byte {
+	if runtime.GOOS == "windows" {
+		faviconPath := faviconDir + "favicon.ico"
+		ret, _ := p.uiBox.ReadFile(faviconPath)
+		return ret
+	}
+
+	return p.GetFaviconPng()
+}
+
+func (p *FaviconProvider) GetFaviconPng() []byte {
+	faviconPath := faviconDir + "favicon.png"
+	ret, _ := p.uiBox.ReadFile(faviconPath)
+	return ret
+}