Refactor/data code models

[abderrahmaneMustapha]

Description

i added multi language urls support for data models (articles, and learn) Resolves #24

Type of change

• New feature (non-breaking change which adds functionality)

[abderrahmaneMustapha]

@Omar-Belghaouti thats perfect, i think that we need to wait for @ZibanPirate too ??