Support providing input events to CliktTesting

It would be nice if [CliktTesting](https://github.com/ajalt/clikt/blob/master/clikt-mordant/src/commonMain/kotlin/com/github/ajalt/clikt/testing/CliktTesting.kt) supported providing input events to the TerminalRecorder. See https://github.com/ajalt/mordant/blob/master/mordant/src/commonTest/kotlin/com/github/ajalt/mordant/input/InteractiveSelectListTest.kt#L59-L65
