Add linting step to "Add your project" documentation

[ZibanPirate]

Description

when following the instruction in:
https://www.dzcode.io/Learn/About_dzcode_io/Add_Your_Project_To_dzcode_io

you end up creating a PR, with failing checks, that's because you're missing an important step that is not mentioned in the documentation, this task is to add that step to the documentation.

Check List

1. Add linting step to "Add your project" documentation

Additional Comments

https://www.dzcode.io/Learn/About_dzcode_io/Add_Your_Project_To_dzcode_io
eg of effected PR: #317

the missing step is this one