Feature Request: Adjustable Font Size

[Kensei-Kimoto]

I would like to start by expressing my gratitude to the developers and maintainers of chatMLX for their hard work and dedication to creating a high-quality platform.

Currently, the font size in chatMLX is fixed and cannot be changed by users. Implementing a font size adjustment feature would improve readability and user experience.

By adding a font size adjustment feature, users can select a font size that suits their needs, leading to improved readability and a better overall experience.

Finally, this document was created and translated using chatMLX with llama3.3-70b-instruct-4bit.