Optimize the state machine

[clearloop]

The state machine doesn't work...It's buggy to pass complex data to wasm, we need to use Closure instead of Fn, ref gesture.rs

The syntax of the state machine is hard to use, need to refactor as below

Components without state

struct Hello {
  name: String,
}

impl LifeCyle for Hello {
  fn create(name: String) -> Self {
       Self { name }
  }
  
  fn render(&self) -> Center {
     Center::with(Text::with(&format!("Hello, {}", self.name)))
  }
}

Components with state

struct Counter {
  count: i32,
}

impl LifeCyle for Counter {
  fn create(count: i32) -> Self {
    Self { count }
  }

  fn render(&self) -> GestureDetector {
    GestureDetector::new(
      Text::with(format!("count: {}", &self.count)),
    ).register(Gesture::Tap, |&mut state| state.count += 1)
  }
}