Fix camera sources showing no video (declare camera usage in Info.plist)

macOS refuses camera access unless the app bundle's Info.plist declares
NSCameraUsageDescription, so QCamera never started and camera sources showed
no video (Syphon and video files were unaffected). The project already had a
proper custom Info.plist (com.artpluscode.MapMap identity, version 0.6.3) but
it was never wired into the build, so qmake generated a default plist without
any usage description.

Wire the custom Info.plist via QMAKE_INFO_PLIST and add NSCameraUsageDescription
(+ NSMicrophoneUsageDescription). macOS now prompts for camera permission on
first use; once granted, camera sources display video. This also gives the
bundle its real identifier and version.

Author: aalex

resources/macOS/Info.plist

@@ -23,7 +23,12 @@
 <key>NSPrincipalClass</key>
 <string>NSApplication</string>
 <key>NSSupportsAutomaticGraphicsSwitching</key>
-<true/><key>NOTE</key>
+<true/>
+<key>NSCameraUsageDescription</key>
+<string>MapMap uses the camera to display a live camera feed as a video-mapping source.</string>
+<key>NSMicrophoneUsageDescription</key>
+<string>MapMap may access the microphone when capturing audio from a camera device.</string>
+<key>NOTE</key>
 <string>This file need to be update at every release</string>
 
 </dict>

src/src.pri

@@ -61,6 +61,11 @@ macx {
   # just for reference. Do not uncomment.
   # CONFIG-=app_bundle
   ICON = resources/app_icons/mapmap.icns
+
+  # Custom Info.plist: real bundle identity + camera/microphone usage
+  # descriptions (required by macOS to access the camera; without them
+  # QCamera cannot start and camera sources show no video).
+  QMAKE_INFO_PLIST = $$PWD/../resources/macos/Info.plist
 }