feat(app): pass inject/provide helpers as second argument to plugins

[danielroe]

this may be a deliberate choice but if so, it will make it harder for module authors to create plugins for both 2/3

[atinux]

Well the context is also different (nuxt vs ctx). I agree we need to find an easy way to make a plugin for both N2 and N3 compatible.

[atinux]

Let's discuss in nuxt/bridge#119 :)

[pi0]

We can take the same approach of module compatibility to by default provide a semi-compatible interface (reducing breaking change surface) and defineNuxtPlugin (from @nuxt/app) for typing and better control (plugins using define, probably don't need a compat proxy)

[pi0]

~> nuxt/bridge#118

[danielroe]

Just (re)rediscovered this, which makes me think that we should go ahead with this PR (or update the signature):

framework/packages/app/src/nuxt.ts

Lines 28 to 30 in ce72ce6

	export interface Plugin {
	(nuxt: Nuxt, provide?: Nuxt['provide']): Promise<void> | void
	}

[pi0]

We can probably start showing a deprecated message on inject usage to use nuxt.provide when had defineNuxtPlugin (#230)