[FEAT] Add a new page for the 'Model Generation Application'

[tbouffard]

• On the Landing section of the Home page, add a card to link to the new page.
• Integrate JotForm in the new page: http://XXX/model-generation-application
• Add a new page for the conditions of usage for this service: http://XXX/model-generation-application-conditions

Based on #494
Some issues will be fixed later: #506, #507, #508

Remaining tasks

• Validate the wording of the 'Terms of Use'
• make the anchor to the 'Terms of Use' work (if possible, make it work to the form as well to be able to redirect to the form directly) --> we now have a dedicated page
• Form: update the link to the 'Terms of Use' for production use

[github-actions]

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