[CAMP-2423] modal component update

[CAMP-2149] Added Header Component in CG UI Library

[CAMP-2299] Added Rest Parameter in Button Component

CAMP-2273 Add Ref to the Input Element

mobile css fix for grouped dropdown

Update Dropdown compoenent styling and global light gray colors to ma…

…tch Figma

Inline Style Update For Addon Input

Input Addon Fix For Mobile Screens and Removal of Growl Warning

update repo URL in npm configuration files

Updated Heading classes as per CG standards