IDE Plugins for editing vela applications

One possible way to use the Kubernetes API to connect to the KubeVela Control Plane in the background and fetch the required information like X-Definitions, ComponentDefinitions, TraitDefinitions, PolicyDefinitions, and WorkflowStepDefinitions. The plugin can then use this information to provide syntax highlighting and autocompletion for these definitions in the YAML files. To preview the rendering result of components and traits, the plugin can use the Kubernetes API to create a dry-run of the KubeVela application on the remote cluster. The output can be displayed in the IDE to give users an idea of how the application will look when it's deployed. To compare the difference between the current application configuration and the corresponding one on the remote cluster, the plugin can use the Kubernetes API to fetch the current configuration and compare it with the local one. The differences can be highlighted in the IDE for easy identification. To preview the selected clusters by the topology policy, the plugin can use the Kubernetes API to fetch the list of clusters and display them in the IDE. The plugin can also use the Kubernetes API to fetch the topology policy and apply it to the list of clusters to display the selected clusters. For ComponentDefinition and TraitDefinition, the plugin can use the CUE language to provide validation for the CUE input and preview the rendering result. The plugin can also use the Kubernetes API to fetch the ComponentDefinition and TraitDefinition and display them in the IDE for reference.