Support Integration external tool

[zakblacki]

It would be nice if we could add usage from Kilocode/Roocode/Cline directly just as they did with claude code subscribtion
also please consider adding a subscription instead of pay per usage

[dazzafact7]

#275

[jahooma]

What do you mean by "add usage from Kilocode/Roocode/Cline directly"? Do you mean pay for those apps with your Codebuff account billing? (Because that wouldn't be possible.)