feat(vmimport): Add UI section to documentation page

[wombelix]

Problem:

The UI Integration of the VM Import Controller flow was introduced in the Harvester UI Extension Repository.

Solution:

Adding a new UI section to the vmimport page to make user aware of the new capability and that it mirrors the features that the already documented API provides. The benefit is the option to use the VM Import feature without writing YAML manifest files.

Related Issue(s):

Issue harvester/harvester#4663
UI Pull Request harvester/harvester-ui-extension#642

Test plan:

I did a yarn install followed by yarn gen-api-docs and yarn start on my local development machine and validated that the addition looks as expected and as written in the markdown file. Also that the two new images are shown and can be zoomed in.

Additional documentation or context

[github-actions]

Name	Link
🔨 Latest commit	da11b02
😎 Deploy Preview	https://6980ba68cb88ed7989233fab--harvester-preview.netlify.app

[votdev]

Suggested change

	The VM Import Controller is integrated into the Harvester UI. This allows users to configure `Sources` and create `Virtual Machine Import` jobs via forms. It mirrors the capabilities described in the [API](#api) section without requiring direct YAML editing.
	The VM Import Controller is integrated into the Harvester UI. This allows users to configure `Sources` and create `Virtual Machine Import` jobs via forms.

I think we can remove It mirrors the capabilities described in the [API](#api) section without requiring direct YAML editing. because that is the basic functionality of the Rancher/Harvester UI and does not need to be explained again.