Port TextField styling from Primer React

Also renders clear button using an `IconButton`.

Rough mapping:

| Primer View Components                  | Primer React                                        |
| --------------------------------------- | --------------------------------------------------- |                               |
| .FormControl-input-baseWrap (new class) | .TextInputBaseWrapper                               |
| .FormControl-input-wrap                 | .TextInputWrapper                                   |
| .FormControl-input-trailingVisualWrap   | .TextInput-icon                                     |
| .FormControl-input-leadingVisualWrap    | .TextInput-icon                                     |
| .FormControl-input-trailingAction       | .TextInput-icon                                     |
| .FormControl-input                      | input                                               |
| .FormControl-input-wrap--leadingVisual  | [data-leading-visual]                               |
| .FormControl-input-wrap--trailingVisual | [data-trailing-visual]:not([data-trailing-action])  |
| .FormControl-input-wrap--trailingAction | [data-trailing-action]                              |
| .FormControl-input-wrap--small          | [data-size='small']                                 |
| .FormControl-input-wrap--large          | [data-size='large']                                 |

Author: myabc