* Add FAQ section about how flushPromises work

* Some subtle changes

**What**: Add the following methods

- queryByText
- getByText
- queryByPlaceholderText
- getByPlaceholderText
- queryByLabelText
- getByLabelText

**Why**: Closes #16

These will really improve the usability of this module. These also align much better with the guiding principles 👍

**How**:

- Created a `queries.js` file where we have all the logic for the queries and their associated getter functions
- Migrate tests where it makes sense
- Update docs considerably.

**Checklist**:

* [x] Documentation
* [x] Tests
* [x] Ready to be merged <!-- In your opinion, is this ready to be merged as soon as it's reviewed? -->
* [ ] Added myself to contributors table N/A