## Context
Allows forward slashes for branch names
Also fixes validation behaviour in the form, as currently the error
shows up `onSubmit`, but the button is disabled until the form state is
valid, so the error never shows up
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## Summary by CodeRabbit
* **New Features**
* Extended branch naming rules to support forward slashes and additional
special characters, allowing more flexible branch names.
* Enhanced form validation to provide real-time feedback as you type.
* **Style**
* Refined form field label text formatting.
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Joshen Lim
57ab28c2f0