Add theme customizations to the boilerplate

[matthewwong525]

• Include darkmode & theme customization.
• Maybe also create an AI to help with it?
• look into https://pub.dev/packages/flex_color_scheme

[sudhar08]

Hey can I can work on this I am willing to contribute to your idea. Let me Know

[matthewwong525]

Hey @sudhar08 just saw this message! Yeah I'd be happy to get some help here. Join the discord and message me there: https://discord.gg/5Td4sQm5UG