**Changes**
- Add `WidgetStateInputBorder` class, with `.resolveWith()` and `.fromMap()` constructors
- Deprecate `MaterialStateOutlineInputBorder` and `MaterialStateUnderlineInputBorder` and provide data-driven fixes
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**Other changes** based on https://github.com/flutter/flutter/pull/154972#pullrequestreview-2344092821
- Fix documentation copy-paste typo ("OutlinedBorder" â "InputBorder")
- Add test to ensure borders are painted correctly
- Add DartPad sample & relevant test