Fix darwin protocol handling

Author: ShayBox

build/darwin/MultiMC-Twitch.app/Contents/Info.plist

@@ -6,5 +6,18 @@
     <string>MultiMC-Twitch</string>
     <key>CFBundleIdentifier</key>
     <string>com.shaybox.multimc-twitch</string>
+    <key>NSUIElement</key>
+    <true/>
+    <key>CFBundleURLTypes</key>
+    <array>
+    <dict>
+        <key>CFBundleURLName</key>
+        <string>Twitch</string>
+        <key>CFBundleURLSchemes</key>
+        <array>
+        <string>twitch</string>
+        </array>
+    </dict>
+    </array>
 </dict>
 </plist>