Pull out battle station

[chenglou]

If the user likes to use the fancy build output option, then this should be the unifying UI for native and js.

We're currently doing string matches on bsb -w's output, which is hacky. Maybe we should just use this as a new front-end for bsb watcher, similar to bsb_watcher.js. Though bsb -w -make-world goes through a different path.

@bobzhang

[bobzhang]

Battle station is fancy, but I found integration with editors are more useful, you can click and jump into the source and do a quick fix, maybe we can add it to vscode and merlin plugin

https://github.com/bobzhang/bucklescript-vscode/blob/master/.vscode/tasks.json#L13

cc @freebroccolo

[chenglou]

And the editor integrations will be using bsb_watcher.js or not? I guess not? (Which was my point that I can take care of terminal watching UI)