[EPIC]: Dynanically Get Side Bar Menu Data

[Psypher1]

The Sidebar data(the menus) are currently hard coded in the src/utils/langMenuas.js

The menu items relate to the files within the specified language folder. For example

Folder

├── learn
│   ├── french
│   │   ├── basics.md
│   │   ├── nouns.md
│   │   ├── verbs.md

Menu data to be passed to lookup and then sidebar

export const frenchMenu = ["Basics", "Pronouns", "Verbs"];