Ap/global font definitions

[adityapat24]

ℹ️ Issue

Closes #275

📝 Description

Globalized font definitions used in the code base

Briefly list the changes made to the code:

1. Added font families (--font-sans (Montserrat + fallbacks))
2. Added Google Fonts preconnect and a stylesheet for Montserrat so the chosen font loads and renders consistently without relying on system fonts.
3. Edited files in description and replaced hard coded sizes with the new variables created for size

[janekamata]

Some small fixes to make but otherwise looks good and was what I had intended with the ticket