chore: shared button/ button wrapper

[cimigree]

closes #19

• Adds a button wrapper that has its own props and extends one MUI button prop
• Makes sure the button is typed for specific colors, variants, and sizes and uses the sx prop for custom styling
• Adds to the theming a little so that the styles match the mobile button styling
• Adds buttons to the Home component to be able to see the possibilities and varieties

Instructions: Try out the different buttons in the home component!