[DOCS] Add documentation

[yashchaudhari008]

TODOs:

• [x] Add how to use the app as the first-page / startup-page for chrome
• [x] Add project details
• [x] Add basic setup information about how to use this application
• [x] Add contribution guide
• [x] Add status indicator and other small widgets
• [x] Add license
• [ ] Code-of-conduct information
• [ ] PR template
• [x] Guidelines for creating issue
• [x] Branching strategy details

[alvin-dennis]

can i work on code of conduct and pr template? @yashchaudhari008 pls assign me under hacktoberfest