* Update SimpleFungibleToken to use stdlib
We do not want to put an Int type into the standard library before we
have builtin support for arbitrary precision integers. So we include the
Int type locally in the project for now.
* Update reference to stdlib
* Fix shell-tests for SimpleFungibleToken
* Renaming MiniJuvix to Juvix
* Make Ormolu happy
* Make Hlint happy
* Remove redundant imports
* Fix shell tests and add target ci to our Makefile
* Make pre-commit happy
