add build scripts

scripts/_app_scaffolds/mac/myapp.app/Contents/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+    <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+    <plist version="1.0">
+    <dict>
+        <key>NSHighResolutionCapable</key>
+        <true/>
+        <key>CFBundleExecutable</key>
+        <string>bootstrap</string>
+        <key>CFBundleGetInfoString</key>
+        <string>{APP_NAME}</string>
+        <key>CFBundleIconFile</key>
+        <string>icon.icns</string>
+        <key>CFBundleIdentifier</key>
+        <string>{APP_ID}</string>
+        <key>CFBundleName</key>
+        <string>{APP_BUNDLE}</string>
+        <key>CFBundleShortVersionString</key>
+        <string>{APP_VERSION}</string> 
+        <key>CFBundleGetInfoString</key>
+        <string>{APP_NAME} {APP_VERSION}</string>
+        <key>CFBundlePackageType</key>
+        <string>APPL</string>
+        <key>LSMinimumSystemVersion</key>
+        <string>{APP_MIN_OS}</string>
+        <key>NSAppTransportSecurity</key>
+        <dict>
+            <key>NSAllowsArbitraryLoads</key>
+            <true/>
+        </dict>
+    </dict>
+    </plist>

scripts/_app_scaffolds/mac/myapp.app/Contents/MacOS/bootstrap

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+#!/usr/bin/env bash
+# Based on code by https://github.com/malipetek - hey you did a brilliant job!
+MACOS="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+CONTENTS="$(dirname "$MACOS")"
+exec "${MACOS}/main" --path="${CONTENTS}/Resources" --enable-extensions=true