Improve "known problems" page

Beyond simply referring to the GitHub issues page, we should also provide a quick list of known limitations and workarounds including:

### `eslint-plugin-import` doesn't support `exports` in `package.json`

#### Problem

Eslint shows an error but "there is none".

#### Workaround

Until https://github.com/import-js/eslint-plugin-import/issues/2352 is fixed:

```
// TODO remove eslint-disable when fixed https://github.com/import-js/eslint-plugin-import/issues/1810
// eslint-disable-next-line import/no-unresolved
```