feat: add ⚡️ Thunder support for SignUp component

[brionmario]

Purpose

This PR adds comprehensive Thunder platform support and render props functionality to the SignUp component, bringing it to feature parity with the SignIn component. The implementation enhances developer experience by providing flexible UI customization options while maintaining seamless integration with Asgardeo's Thunder authentication platform.

Usage Examples

Default

<SignUp onComplete={() => navigate('/dashboard')} />

Render Props (New Pattern)

<SignUp onComplete={() => navigate('/dashboard')}>
  {({values, errors, handleInputChange, handleSubmit, isLoading, components}) => (
    <form onSubmit={(e) => {
      e.preventDefault();
      handleSubmit(components?.[0], values);
    }}>
      <input
        name="email"
        value={values.email || ''}
        onChange={(e) => handleInputChange('email', e.target.value)}
        className="custom-input-style"
      />
      {errors.email && <span className="error">{errors.email}</span>}
      
      <button type="submit" disabled={isLoading}>
        {isLoading ? 'Signing up...' : 'Sign Up'}
      </button>
    </form>
  )}
</SignUp>

Related Issues

• feat: provide initial provision for asgardeo/thunder runtime #212

Related PRs

• N/A

Checklist

• Followed the CONTRIBUTING guidelines.
• Manual test round performed and verified.
• Documentation provided. (Add links if there are any)
• Unit tests provided. (Add links if there are any)

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?

[asgardeo-github-bot]

🦋 Changeset detected

The changes in this PR will be included in the next version bump.

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