refactor(config): rename default staticDir to public

[danielroe]

Note: resolving staticDir in Nitro in relation to rootDir as a unrelated static dir bug.

@pi0 Do you know if static is hard-coded in Vercel's FS API?

framework/packages/nitro/src/presets/vercel.ts

Lines 6 to 21 in 8d6b97a

	export const vercel: NitroPreset = extendPreset(node, {
	entry: '{{ _internal.runtimeDir }}/entries/vercel',
	output: {
	dir: '{{ _nuxt.rootDir }}/.vercel_build_output',
	serverDir: '{{ output.dir }}/functions/node/server',
	publicDir: '{{ output.dir }}/static'
	},
	ignore: [
	'vercel.json'
	],
	hooks: {
	async 'nitro:compiled' (ctx: NitroContext) {
	await writeRoutes(ctx)
	}
	}
	})

resolves nuxt/nuxt#10971

[pi0]

@danielroe Re vercel, yes as far as remember but since unrelated we can try with public to see if they also detect public for more consistently...