Function handleRuntimeSelected

handleRuntimeSelected(
    message: RuntimeSelectedMessage | KernelSelectedMessage,
    selectRuntime: RuntimeSelectCallback,
    updateStore?: RuntimeSelectCallback,
    setKernelInitializing?: KernelInitializingCallback,
): void
Handler for kernel-selected and runtime-selected messages. Extracts runtime from message and calls the selection callback.

For Pyodide and Datalayer cloud runtimes, the spinner is kept visible until the kernel monitoring code detects the kernel is ready (status='idle'). For local/remote kernels, the spinner is cleared immediately since they're ready as soon as they're selected.
Parameters
- message: RuntimeSelectedMessage | KernelSelectedMessage
  The kernel/runtime selected message from extension
- selectRuntime: RuntimeSelectCallback
  Callback to update runtime state (from useRuntimeManager)
- OptionalupdateStore: RuntimeSelectCallback
  Optional callback to update editor-specific store
- OptionalsetKernelInitializing: KernelInitializingCallback
  Optional callback to clear initialization state
Returns void
Example
```
case "kernel-selected":
case "runtime-selected":
  handleRuntimeSelected(message, selectRuntime, (rt) => store.getState().setRuntime(rt), setKernelInitializing);
  break;
```
- Defined in webview/utils/runtimeMessageHandlers.ts:78