get method
Reads a string value by key.
Values are checked from explicit overrides, meta tags, browser globals,
and finally fallback.
Implementation
String? get(String key, {String? fallback}) {
return values[key] ??
_fromMeta(key) ??
_fromBrowserGlobal('__FLINT_ENV__', key) ??
_fromBrowserGlobal('flintEnv', key) ??
fallback;
}