react admin customized

* refactor: change page title to app name

* style: add google fonts

* style: remove body insets

* style: add font className declarations

* chore: add spec

* style: add customs theme

* style: add catpuccin theme palettes

* style: override Mui themes with catpuccin

* style: change dark and light theme

* rm unused file

Author: Abi-Nf