add arabic encoding

[AymaneZizi]

in the version I developed, you do have two txt files as an example, one for Arabic text and the other for English text, and the code changements are to support arabic spacing and encoding.
also the nodes are dragable but they return to initial position.
Future improvement:

• Node stays in the position where was dragged to.
• Root node is centred, and its children Nodes are equally divided in both right and left sides.

[AymaneZizi]

in the branch:

• Add input file (txt/csv)
• Zoom in/out Tree
• Export tree as png
• toggle in/out nodes to their parent

[AymaneZizi]

don't forget to initiate package

npm init -y

and install packages

npm install papaparse express chokidar

then to run the app :

node index.js