Refactor chrome-extension code

[AdityaPimpalkar]

Tasks

• Separate content scripts with their utils for scripts on special behaviour site (eg. LinkedIn, Gmail)
• Declare separate enums for runtime events and tab events with proper naming convention
• Create a default button script
• Refactor inject button script
• Replace iframe with sidepanel
• Refactor apollo client
• Separate individual query and mutation to separate file
• Remove try..catch on all db calls, handle exception on apollo level
• Cleanup unused images and files