Feature request: Option to generate timeline from succeeding test

[schultek]

I'd like a way to generate a timeline from a succeeding test.

The use-case is that with #77 I could then have a folder of all test timelines I can check out after running the tests and e.g. make available to our product team.

[passsy]

With flutter test --dart-define=SPOT_TIMELINE_MODE=always you can already generate the timeline of all succeeding and failing tests.

Once #77 is implemented if should be even easier to export all timelines

[schultek]

Ah nice, thanks.