Add support for links in the form representation

[sbegaudeau]

Problem

We want to add links in the form representation.

Solution

We will just do it :)

Cutting backs

Rabbit holes

No-gos

Test

• Automated developer tests merged and pass (with reasonable code coverage)
• Automated End-to-End tests merged and pass (Cypress)
• Feature/bug fix manually tested/validated by at least one person not involved in the implementation
• Collaborative tests passed by hand
• Exploratory test passed by MEB
• Business acceptance test passed by MEB

Doc

• Internal Doc updated
• External Doc updated
• Validation Doc updated

UX/UI

• Zeroheight updated
• Storybook updated

Next

• Any left-over tasks in the Github issues

[sbegaudeau]

See the relevant ADR for additional details: https://github.com/eclipse-sirius/sirius-components/blob/master/doc/adrs/030_add_a_link_representation.adoc