Feature Request: ScenarioFn uses common testing interface

[sirockin]

The f1. T type is almost compatible with the testing.TB interface which exposes the common methods of testing.T, testing.B and testing.F.

Making f1.T completely compatible with testing.TB or exposing a similar interface with a subset of the testing.TB methods (and amending ScenarioFn to use this interface) would facilitate reusing the same test implementation as standard tests or f1 load tests as well as being a generally good practice.

The changes necessary to f1.T to achieve compatibility with testing.TB would be as follows:

testing.TB method	f1.T method	Changes Required
Error(args ...any)	func (t *T) Error(err error)	backward compatible signature change
Fatal(args ...any)	func (t *T) Fatal(err error)	backward compatible signature change
Helper()	(not implemented)	stub implementation
Setenv(key, value string)	(not implemented)	stub implementation
Skip(args ...any)	(not implemented)	stub implementation
SkipNow()	(not implemented)	stub implementation
Skipf(format string, args ...any)	(not implemented)	stub implementation
Skipped() bool	(not implemented)	stub implementation
TempDir() string	(not implemented)	stub implementation