Add an example of working with ava

Is your feature request related to a problem? Please describe. I can’t get Ava to work with Typescript and Nuxt. It’s very weird, but my project works npm run dev is all fine, but then if I type npm run test with ava not only do I get an error in the test about my types, but also when I run npm run dev from this point on it stops working up until I remove package-lock.json and node_modules!

I believe (before I migrated to 2.11) on 2.0.0 I had a different problem but not this one though.

My ava configuration that I got from somewhere a year ago:

	"ava": {
		"compileEnhancements": false,
		"extensions": [
			"ts"
		],
		"extensions": ["ts"],
		"files": [
			"**/*.test.ts"
		],
		"sources": [
			"src/**/*"
		],
		"require": [
			"esm",
			"ts-node/register"
		],
		"verbose": true
	},

Describe the solution you’d like An example how to work with testing in Typescript on Nuxt 2.9+

[kevinmarrec]

Anyone wanting to create a PR with minimal ava + TypeScript setup ? 😃

[vintprox]

t.context is of unknown type, thus adding property to it creates error Object is of type 'unknown'. To negotiate it, I had to store nuxt instance in the scope of script.

Also, nuxt contains no typings for Nuxt and Builder, had to shim them to any as people show in #44. Indeed, what a weird sight.

Plus, E2E instructions are not being clear about running Nuxt with its plugins for testing components in isolation.