Bug: Launching Sub Generators crashes when first folder in workspace is virtual file system (e.g. ABAP)

[longieirl]

Description

Issue found when testing; https://github.wdf.sap.corp/ux-engineering/tools-suite/issues/37078

Sub generators crash when ABAP virtual folder is first in workspace.

Currently, the generator is failing when this line of code is called;

await commands.executeCommand('loadYeomanUI', {
                    generator: `@sap/fiori:${subGenerator}`,
                    messages: {
                        generators_loading,
                        panel_title,
                        yeoman_ui_title,
                        channel_name: 'Adaptation Project',
                        artifact_generated_files
                    },
                    data: {
                        path
                    }
                });

During the initial implementation of the bug, all calls to loadYeomanUI need to be wrapped, to ensure there is a valid path set before the yeoman UI is loaded. Another PR was generated to cover this flow;

https://github.wdf.sap.corp/ux-engineering/tools-suite/pull/37103

However, launching the Application Wizard directly and choosing the Fiori generator is not covered since the yeoman generator is being triggered directly;

handle this https://github.com/SAP/yeoman-ui/blob/master/packages/backend/src/yeomanui.ts#L368

Steps to Reproduce

Steps to reproduce the behavior:

1. Create a workspace file with the content :

{
	"folders": [
		{
			"name": "UIA_000_DEVINEA_EN",
			"uri": "abap:/repotree-v1/UIA_000_DEVINEA_EN"
		}
	]
}

2. Open the workspace and try to launch the command "Download ADT Deployed App from SAPUI5 ABAP Repository"
3. yeomanui crashes.