feat: dev script for mitosis cli

[rgodha24]

The main changes made were in the packages/cli/src/build/dev.ts file and packages/cli/src/commands/dev.ts.

Basically, it runs something like the "build" command on each file change, only on the files changed.

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Name	Status	Preview	Updated
mitosis-fiddle	✅ Ready (Inspect)	Visit Preview	Dec 20, 2022 at 2:34PM (UTC)

[rgodha24]

I have not added tests because I'm not very good at writing them. If you could provide me with guidance, that would be great!

[rgodha24]

@samijaber anything else I can do to get this pr merged?

[ohkimur]

@samijaber Isn't this feature very important? Does it need some more love? I would very much use this feature. Looking more at what it does, I don't think it should be called dev but rather it should be a --watch flag.

@rgodha24 I guess you closed this issue because it passed a long time with no answer, am I right? Would you care to reopen this issue and refactor it from dev to --watch? I'm willing to help if necessary.

[rgodha24]

mitosis already has a "--watch" flag (I think), but that's much slower, especially when there's large amounts of files. this only rebuilds the files that are actually changed which is why I called it "dev"

[ohkimur]

@rgodha24 I see. Maybe we should try to improve that one instead. What do you think about that?

[kingzez]

It would be perfect if we supported incremental build.

[rgodha24]

I'd be down to reimplement a pr starting on may 11 (my last ap test 💀).

[samijaber]

Apologies for the delay in getting to this PR @rgodha24. This is definitely a very useful feature! And there is currently no --watch flag for mitosis build, so re-implementing this as mitosis build --dev would be very useful indeed. 🙏🏽

If you have any doubts or questions, I would suggest opening a github issue outlining how you plan on doing it so we can go over it there before a PR is put up.