Add new Forms & Inputs components for basic contact page form

[markteekman]

Forms can be very complex, not just accessibility wise. We can make a small start by adding some default components / wrappers with some accessibility standards baked in like custom validation and error handeling.

Notes

• Vanilla example: https://codepen.io/markteekman/pen/Yzdovxo

[markteekman]

Use the upcoming Astro Actions to handle submitting form data.