Set `"strict": true` in tsconfig

[hymair]

Describe the feature

As in Nuxt, strict should ideally be enabled by default.

Additional information

Overwriting tsconfig works as well so far:

// https://nitro.unjs.io/guide/typescript
{
    "extends": "./.nitro/types/tsconfig.json",
    "compilerOptions": {
        "strict": true
    }
}