Fold all by label

Is your enhancement related to a problem? Please describe.

As someone who works with Ansible and makes frequent use of inline Vault-encoded secrets, I often have large chunks of text in my code that are gibberish and I dont need to directly edit. IE:

	-name : "my_web_cert"
     data: !vault |
		$ANSIBLEVAULT;1.1:AES256
		29387345782436495734589632895763298756238576234987652384756239854623987568395642
		[repeat for many lines]
		45i35928375483975

Describe the solution you would like

As VSCode (and the YAML extension) support code-folding based on indentation/nodes, it would be quite helpful to be able to fold all nodes matching a specific text-string (maybe all nodes that match the currently highlighted text) so I could, for example, fold all the data: !vault | content with one quick action.

Describe alternatives you have considered

Would it be better to add this functionality to VSCode's core and make it a general feature across all code? Possibly. I'm not sure what the impacts of using it on non-'structured' would have. This is just my specific use case. I will add a similar request to the core VSCode project for discussion.

Additional context

Start by reviewing how the YAML extension currently provides indentation- and node-based folding, then compare that with VS Code's core folding behavior. Clarify whether matching highlighted text or a specified label should drive folding, and whether the feature belongs in the extension or VS Code core. Done means the ownership and matching behavior are agreed and the requested nodes can be folded through one action.