Show the CLI version from the about dialog.

Signed-off-by: Akos Kitta <kittaakos@typefox.io>

arduino-ide-extension/src/common/protocol/config-service.ts

@@ -2,6 +2,7 @@ export const ConfigServicePath = '/services/config-service';
 export const ConfigService = Symbol('ConfigService');
 
 export interface ConfigService {
+    getVersion(): Promise<string>;
     getConfiguration(): Promise<Config>;
     isInDataDir(uri: string): Promise<boolean>;
     isInSketchDir(uri: string): Promise<boolean>;