Preliminary Tasks: Implemented Home Page UI and updated .gitlab-ci.yaml

Built the Home page UI and updated the .gitlab-ci.yaml file as per the preliminary task requirment mentioned

Home Page UI

Built the home page UI as given in the Figma file Preview

.gitlab-ci.yaml file

New stages have been created for generating the appbundle (.aab) file for the play store and appbundle (.ipa) for the App store

@sunbiz , @shbucher , @Hrishikesh-Bhagwat and @geepriya kindly let me know your views on this, I hope you like it!