fix(@vtmn/svelte, @vtmn/react, @vtmn/vue): `VtmnNavbarLink` force rel noopener noreferrer if target blank

[Tlahey]

Changes description

Compute the rel on the VtmnLink and VtmnNavbarLink components. Fix issue with the class on the VtmnNavbarLink which can displayed class="undefined"

Context

https://www.jitbit.com/alexblog/256-targetblank---the-most-underestimated-vulnerability-ever/

Checklist

• [x] Make sure you are requesting to pull a topic/feature/bugfix branch. Please, don't request directly from your main!
• [x] Check commits & PR names matches our requested structure. It must follow the https://www.conventionalcommits.org pattern.
• [x] Check your code additions will fail neither code linting checks.
• [x] I have reviewed the submitted code.
• [x] I have tested on related showcases.
• [x] If it includes design changes, please ask for a review design-system-core-team-design GitHub team.

Does this introduce a breaking change?

• No

Other information