Feat: add iframe to proposals

[Stef-Rousset]

🎩 Description

This PR adds 2 settings on proposal's component to enable iframe and set the iframe url, and it adds the iframe in the proposal's show page. It also adds a query_params similarto to the src of the iframe, with the proposal title and proposal body sanitized and escaped.
The node version used for this module is 22.14.0, to avoid an error on compilation (ReferenceError: crypto is not defined linked to serialize-javascript)

Testing

1. As an admin, go to the proposals component configuration page, check "Enable iframe" and provide a url like "https://api.multipod.weblyzard.com/embed/27kVzAqaTFRLZU9v6xBvtHyZcPeURpsg/lite" (screenshot one)
2. Go to /system, and in the advance settings add in frame src "api.multipod.weblyzard.com"
3. As a user, go in the FO to a proposal show page and see that the iframe is displayed (screenshot two)
4. Open your devtools and check that the source of the iframe has a query_params similarto that contains the proposal title and proposal body escaped.

Tasks

• Add specs

📷 Screenshots

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