Contact form

I'm proud of completing this form independently (excluding research). I learned more about the `` HTML element in the process of creating this, which is instrumental to me creating more forms in the future. Next time, I'd probably start with just using my own kind of validation rather than using HTML5's validation initially -- the Constraint Validation API is nice, but the popup it has for inputs conflicts with my design.

I didn't have too much trouble with this, aside from replacing the checkbox / radio input with the SVG image ones. I overcame it by using the appearance CSS property, but it feels slightly weird doing so (idk why).