feat: split up ctx.match

[KnorpelSenf]

It makes little sense to have a very ambiguous property ctx.match that narrows down its type in various different ways depending on the handler.

Instead, we should have different dedicated properties that get installed for each use case:

• ctx.match for regex
• ctx.payload for strings
• ctx.args for command arguments
• etc

The types for bot.hears etc need to be adjusted accordingly.