Proposal: make --dab/--bundle global flag

[kadel]

Currently it is kind of strange to do kompose up --dab app.dab but for docker-compose you do kompose -f compose.yml up

Wouldn't it make more sense to move --dab flag to same level as --file?

It would look like this:

kompose --dab app.dab up
kompose --dab app.dab  convert

[ngtuna]

Yes we can much easier doing that than #153 but I'm not sure if this is good strategy in term of UX for supporting more input formats in future. But yeah we can apply that at this moment. I'm +1 for that.