Add recommended build settings to Quick Start (#600)

* Add recommended build settings to Quick Start

* Set ENABLE_USER_SCRIPT_SANDBOXING to NO

Author: tinder-cfuller

genesis.yml

@@ -352,6 +352,7 @@ files:
   - path: BuildSettings/Shared.xcconfig
     contents: |
       ALWAYS_SEARCH_USER_PATHS = NO
+      ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES
       CLANG_ANALYZER_NONNULL = YES
       CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE
       CLANG_CXX_LANGUAGE_STANDARD = gnu++14
@@ -384,6 +385,7 @@ files:
       CODE_SIGN_STYLE = Automatic
       COPY_PHASE_STRIP = NO
       ENABLE_STRICT_OBJC_MSGSEND = YES
+      ENABLE_USER_SCRIPT_SANDBOXING = NO
       GCC_C_LANGUAGE_STANDARD = gnu11
       GCC_NO_COMMON_BLOCKS = YES
       GCC_WARN_64_TO_32_BIT_CONVERSION = YES