Add recording smoke test

[abrichr]

Feature request

We would like to add an automated test that:

• calls openadapt.record
• waits for the recording.started signal to be emitted (fails after e.g. 30s if no such signal is emitted)
• stops the recording by emitting the stop sequence on the keyboard (re-use openadapt.playback)
• asserts something about the state of the database (e.g. that the recording has been created) and filesystem (the video and performance plots have been created)

Motivation

Avoid regressions like in:

• https://github.com/OpenAdaptAI/OpenAdapt/pull/774
• https://github.com/OpenAdaptAI/OpenAdapt/pull/784