added speaker signup | mobile included

[Shazzz135]

This pull request introduces a new speaker sign-up modal form to the initiatives section, enabling users to submit their information to become a speaker. The implementation is modular, with reusable form components and centralized form constants for maintainability and consistency.

New Speaker Sign-Up Modal Feature:

• Added a modal-based sign-up form for speakers, which can be opened and closed from the SpeakerSignUp component. The form collects user details and displays submission feedback. [1] [2] [3] [4]

Componentization and Reusability:

• Introduced a reusable FormField component that supports input, textarea, and select elements, with consistent styling and support for custom props.

Centralized Form Constants:

• Created a formConstants.ts file to define experience options and color constants for consistent use across form components.