Automatically create 'launch.json'

Automatically creates the `launch.json` file when executing
the command `start debugging` whenever a `launch.json` does not
exist under `.theia` or `.vscode`. Once created, users are prompted
to select the type of debug configuration they desire.

Signed-off-by: Vincent Fugnitto <vincent.fugnitto@ericsson.com>

packages/debug/src/browser/debug-frontend-application-contribution.ts

@@ -947,6 +947,11 @@ export class DebugFrontendApplicationContribution extends AbstractViewContributi
 
     async start(noDebug?: boolean): Promise<void> {
         let { current } = this.configurations;
+        // If not current configurations are present, create the `launch.json` and prompt users to select the config.
+        if (!current) {
+            await this.configurations.addConfiguration();
+            return;
+        }
         if (current) {
             if (noDebug !== undefined) {
                 current = {