fork() implemented for following kind of commands:
helloworld | notre_cat
helloworld -b | notre_cat
helloworld -f | notre_cat
helloworld | notre_cat t3
helloworld -b | notre_cat t1
helloworld -f | notre_cat t2
Everything seems to work as expected.
The previous fork() implements still also work as expected.

Also, Coquillage minishell waiting for a new command behavior has return!