Benchmark(Flutter): Test the extension's ability to find generic and flutter-specific security vulnerabilities in real Flutter apps

[evanotero]

Plan

1. Run our generic security taxonomy against real flutter apps. Do we find the security vulnerabilties?
2. Investigate to see if there are security checks specific to Flutter, or specifically for app-development code?
3. Run Flutter-specific checks against real flutter apps. Do we find the security vulnerabilties?

If the performance is strong, we should evangelize the extension to the Flutter community.