Compiler plugin refactor

[JavierSegoviaCordoba]

buildMokokiMessage currently picks the data internally from stack traces. Instead, change the signature to provide that data in a lambda. Additionally, it can be a builder with more customization options.

As a first approach, it is only necessary to change buildHeader to find the IrCall, and extract from it the necessary data:

• fileLink
• fileName
• className (or top-level)
• methodName (or top-level, scripts?)
• lineNumber

private fun buildHeader(tagToPrint: String, priority: Priority, vertical: String) =
    "$tagToPrint$priority.$fileLink $vertical " +
        "$fileName $vertical " +
        "$className $vertical " +
        "$methodName $vertical $lineNumber"