Incorrect classPath is used to launch debuggee

Possibly relates to #69

I stumbled upon similar issue while I was trying to launch a Ktor application.

After some debugging, I traced the root cause to the fact that DebugAdapter re-uses classPath discovery mechanism of [kotlin-language-server](https://github.com/fwcd/kotlin-language-server/blob/main/shared/src/main/resources/projectClassPathFinder.gradle) and by default it only takes into account `compileClasspath` while it should use `runtimeClasspath`

For me, the issue was fixed after I've build my own debugAdapter with modified KLS with `it.compileClasspath.forEach` replaced with `it.runtimeClasspath.forEach`.

@fwcd can you please shed some light on the reason why debug adapter launches a "debuggee" with it's compile time dependencies and not runtimeDependencies ? I might be able to contribute if I understand the context better.

Sorry for the ping, and thanks for the great work you did!