Confirm delete workflow

[webfiltered]

Add workflow confirm delete

From context menu:

Confirm:

Setting - on by default:

Overwrite file dialog converted:

Close unsaved workflow converted:

• Resolves [Feature Request]: Option to enable confirmation when deleting a workflow #1657

[webfiltered]

@huchenlei Can't seem to change the target of require() options using ConfirmPopup. Any idea what's going on there? It seems auto-bound to whatever was clicked, and ignores the setting completely.

[huchenlei]

Let's break this PR further down to following steps:

• Define a global confirmation dialog component that replaces the usage of ComfyAsyncDialog:

  ComfyUI_frontend/src/services/workflowService.ts

  Lines 70 to 74 in d2771a7

  	const res = (await ComfyAsyncDialog.prompt({
  	title: 'Overwrite existing file?',
  	message: `"${newPath}" already exists. Do you want to overwrite it?`,
  	actions: ['Yes', 'No']
  	})) as 'Yes' | 'No'

• Trigger the global dialog when the command is invoked.

This method does not require usage of PrimeVue's confirm popup component. Overall I think the floating dialog is more suitable for this kind of command confirmation, as it is not binded to specific way of interaction. Let's say the we invoke the command with keyboard, we would still want to see the confirmation, but there won't be a intuitive element to bind the popup.