Update README.md by adding screenshots for dark/light themes

Removed unnecessary sections of the readme

Removed wrong picture

Cd into pomtom not flutter_timer_app

Adding more checks to my checklist section

Updating the usage section on how the timer shows you it's done counting

_buildTimerScreen text content changed to be more shorter

Add files via upload

Changed line 65 that has the assets for the new image

Changed the app logo in the sign in page

Added final app logo picture

Added official app logo

Added an image that explains the basic of any flutter app

I am hesitate on which icon to make it official one

Update with description details