docs: add macOS build and packaging instructions

- Add detailed macOS build procedure for Electron app
- Include instructions for Intel and Universal builds
- Add code signing and notarization requirements
- Document running instructions for .app, .dmg, and .zip formats
- Add security warning handling instructions

build/entitlements.mac.plist

@@ -0,0 +1,20 @@
+<?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.cs.allow-jit</key>
+    <true/>
+    <key>com.apple.security.cs.allow-unsigned-executable-memory</key>
+    <true/>
+    <key>com.apple.security.cs.debugger</key>
+    <true/>
+    <key>com.apple.security.device.audio-input</key>
+    <true/>
+    <key>com.apple.security.device.camera</key>
+    <true/>
+    <key>com.apple.security.personal-information.addressbook</key>
+    <true/>
+    <key>com.apple.security.personal-information.calendars</key>
+    <true/>
+  </dict>
+</plist>