move to .env for examples

[micimize]

discovered our ignores in examples no longer pass linting due to https://github.com/dart-lang/sdk/issues/42977

so we should move to a .env file: https://pub.dev/packages/flutter_dotenv/versions/4.0.0-nullsafety.0

commenting out the offending lines for nw

[micimize]

unnecessary – discovered an alternate solution: https://stackoverflow.com/a/20241145/2234013

fixed by #827

[micimize]

nevermind – the work tree solution is super janky and only locally applied