🐛 Bug Report: [dart] new functions use different entry point then current demos.

[Pastajello]

👟 Reproduction steps

Hello,

current demo functions in Dart are having
main(List<String> args) async
as starting point. But new functions created by the CLI are all having
Future<void> start(final req, final res) async

👍 Expected behavior

Demos should be rewritten to comform to new function API.

👎 Actual Behavior

Dart demos are all having wrong/outdated entry point.

🎲 Appwrite version

Different version (specify in environment)

💻 Operating system

Linux

🧱 Your Environment

Appwrite 0.14.2

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct