chore(gulp): except for check-deploy, gulp targets are for (ts|js) only

[chalin]

For gulp, all the default for full-site build tasks (like check-deploy) and (ts|js) all other gulp targets.

[chalin]

@Foxandxss @wardbell : ready for review and merge.
@AlmeroSteyn: this should fix it.

cc @kwalrath

[Foxandxss]

I like but I don't feel confortable having to put the --no-dart in all my commands. Shouldn't it be otherwise? --dart or something like that. There is only 2 people in here that does dart and we have a l10n project to localize this project and all of them needs to run this command too and none of them really care about dart.

[chalin]

I agree and debated that myself. I'm just worried that it is much easier to forget to put --dart when generating docs (and get no warning) than to forget --no-dart in other case (which will result in a friendly reminder being generated).

@naomiblack, @kwalrath : any opinion about this?

[wardbell]

I thought the default was no-dart except for check-deploy.

gulp check-deploy (and the new variation that does a check w/o deploy) should do all languages. Otherwise, IMO, we should default to TS/JS and be explicit with --dart if we want it.

[chalin]

As per @wardbell's suggestion (made elsewhere) I'll make all the default for full-site build tasks (like check-deploy) and (ts|js) all other gulp targets.