Embed app icon and polish Windows build

assets/assets.go

@@ -0,0 +1,14 @@
+package assets
+
+import (
+	_ "embed"
+
+	"fyne.io/fyne/v2"
+)
+
+//go:embed pysentry-icon.png
+var iconBytes []byte
+
+func Icon() fyne.Resource {
+	return fyne.NewStaticResource("pysentry-icon.png", iconBytes)
+}

assets/pysentry-icon.svg

@@ -3,6 +3,7 @@
   <path d="M128 32 204 64v58c0 50-29 82-76 104-47-22-76-54-76-104V64z" fill="none" stroke="#ffffff" stroke-width="20" stroke-linejoin="round"/>
   <path d="M128 76v55l42-32" fill="none" stroke="#ffffff" stroke-width="20" stroke-linecap="round" stroke-linejoin="round"/>
   <circle cx="128" cy="132" r="14" fill="#ffffff"/>
-  <path d="M77 154l26 22-26 22" fill="none" stroke="#ffb31a" stroke-width="18" stroke-linecap="round" stroke-linejoin="round"/>
-  <path d="M125 198h36" fill="none" stroke="#ffb31a" stroke-width="18" stroke-linecap="round"/>
+  <rect x="48" y="142" width="160" height="70" rx="16" fill="#00343c"/>
+  <path d="M74 160l38 17-38 17" fill="none" stroke="#ffb31a" stroke-width="18" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M132 195h48" fill="none" stroke="#ffb31a" stroke-width="18" stroke-linecap="round"/>
 </svg>