UiKit Playground 2.0

Playground 2.0 is an updated version of the Rocket.chat's Playground, which is an app development platform for creating custom apps and integrations. The new version includes several features to accelerate the development process and make it more visual. The first feature is the addition of an example section, which includes a collection of templates that can be used as a starting point for app development. This will save time and effort for developers who are new to app development and help them get started quickly. The second feature is the implementation of a project concept where multiple screens can be grouped, saved, and revisited at a later time. This will enable developers to work on different parts of the app separately and easily switch between them. The third feature is the use of the flow concept from https://reactflow.dev. This will allow each project to be represented as a flow, with each screen represented by a block. Actions can be connected to other blocks to visualise the app's lifecycle. This will make the development process more visual and easier to understand. The last feature is the ability to "compile the flow" and run it as a demo. This will allow developers to quickly present a mock or app to validate its usefulness. This will save time and effort for developers who want to get feedback on their app quickly. Overall, Playground 2.0 is an app development platform that makes the development process faster, more visual, and easier to understand. It includes several features that will help developers create custom apps and integrations quickly and efficiently.