Embed AppIcon.png within binary (#30)

* Build product explicitly

Without it resources are not embedded in the executable

* Embed icon in code

Sources/tart/Commands/Run.swift

@@ -38,8 +38,7 @@ struct Run: AsyncParsableCommand {
       nsApp.setActivationPolicy(.regular)
       nsApp.activate(ignoringOtherApps: true)
 
-      let icon = Bundle.module.image(forResource: "AppIcon.png")
-      nsApp.applicationIconImage = icon
+      nsApp.applicationIconImage = NSImage(data: AppIconData)
 
       struct MainApp: App {
         var body: some Scene {

Sources/tart/Resources/AppIcon.png

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8dd6af1a08bbcdc4faf0ff53601b38136c90231e11bd81bc8cd477d6f1c7d3f2
-size 209404

Sources/tart/tart.entitlements

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>com.apple.security.virtualization</key>
-	<true/>
-</dict>
-</plist>