[iOS] Use `Grid` or `LazyHGrid` for `SessionView`'s chip ui

**Idea Description**

- Currently, a custom view is used for representing that ui. Maybe `Grid` or `LazyHGrid` is better way for representing that.

**Reference images and links**
- https://developer.apple.com/documentation/swiftui/lazyhgrid
- https://developer.apple.com/documentation/swiftui/grid