This introduces `Ink.TextField`, a styled text input component. It supports text-like input types (text, search, email, tel, url, password), placeholder text, form field names, arbitrary attributes, a disabled state, and an optional leading icon (such as ink-i-search for search boxes). The type is a TextFieldType union, so types that would break the field chrome are caught at compile time. The component is structured as a wrapper element drawing the field chrome, containing the optional `__icon` and the native `__input`. The input is exposed as an `inputEl` member, with `value`, `disabled`, `placeholder`, and `autofocus` properties proxying to it, plus a `focus()` method. Consumers can listen to standard DOM events (`input`, `change`) on the input. Focus and hover styling use `:focus-within`/`:hover` on the wrapper. Because the wrapper draws the chrome, clicking the padding or the icon focuses the input. This matches how a native field behaves. Fields can be given an accessible name through the `ariaLabel` and `ariaLabelledBy` options. This matters most for icon-only search boxes, where placeholder text is not a reliable label. `ariaLabelledBy` takes precedence when both are set. An initial value is set as an attribute as well as a property, so it becomes the field's default value. Resetting a containing form now restores that value instead of blanking the field. Styling uses the existing input design tokens (`--ink-p-input-*`, `--ink-g-border-input`, `--ink-u-border-radius-input`) through a new schema/component/theme triplet. The wrapper pins `font-weight` and `line-height`, the same way `Ink.Button does`, so a host page cannot distort the field's height. The input resets its appearance, so browsers do not draw their own chrome for types such as search. This is the foundation for a new auto-complete/search component, which builds on top of this field. Testing Done: - Ran unit tests. - Verified the appearance and default height in Firefox and Chrome, including the search-icon configuration. Confirmed that a host page setting line-height and font-weight leaves that height unchanged. - Verified that clicking the leading icon focuses the input, and that the focus ring is drawn around the wrapper. - Added a new storybook entry and verified appearance in light and dark modes.