Add macOS Audio VU Meter app with system monitoring

Features:
- Real-time audio level monitoring via BlackHole virtual audio device
- Classic VU meter display with dB scale (-60 to 0 dB)
- Peak hold indicators with configurable hold time
- System resource monitors: CPU, RAM, Disk, Network
- SwiftUI interface with dark theme
- Multi-device audio input selection
- Settings window for configuration

Built with AVAudioEngine for audio capture and Mach kernel APIs
for system statistics.

AudioVUMeter/AudioVUMeter/Info.plist

@@ -0,0 +1,32 @@
+<?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>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>Copyright © 2024. All rights reserved.</string>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Audio VU Meter needs access to audio input to display audio levels from BlackHole or other audio devices.</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+</dict>
+</plist>