Refactor the code base

There are a lot of files present in the daily-code/packages/ui/src folder

The components can be moved into a specific folder and be used from there. And I also noticed that daily-code/packages/ui/src/button.tsx has no usage.

If anyone wants to work on it please have a look.

It will improve the experience of the people who want to contribute as it would make it less confusing to understand the code.

@hkirat do you agree?