feat: add form components and exhibition registration page

- Implemented Checkbox, Input, Radio, Select, Textarea components for form handling.
- Created exhibition registration page with integrated form components.
- Added validation and state management for form inputs.
- Included styles and accessibility features for better user experience.

public/site.webmanifest

@@ -0,0 +1 @@
+{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}