style(tailwind): add colors for theme

Objective:

Add project colors from the design system.

What has been done:

• Added colors to tailwind.config.ts

tailwind.config.ts

@@ -8,10 +8,6 @@ const config: Config = {
   ],
   theme: {
     extend: {
-      backgroundImage: {
-        'gradient-radial': 'radial-gradient(var(--tw-gradient-stops))',
-        'gradient-conic': 'conic-gradient(from 180deg at 50% 50%, var(--tw-gradient-stops))',
-      },
       colors: {
         primary: {
           100: '#ebf4ff',