Add hx-post request to send Sunrise form and handle data transformation

[daniellemaxwell]

Scope of changes

This PR adds the route to send the Sunrise message to the hx-post attribute, transforms the data sent in the request, and adds a crypto address field for the originator.

The response currently returns an error, but this is related to SC-28577.

Type of change

• bug fix
• new feature
• documentation
• other (describe)

Acceptance criteria

Describe how reviewers can test this change to be sure that it works correctly. Add a checklist if possible.

Author checklist

• I have manually tested the change and/or added automation in the form of unit tests or integration tests
• I have updated the dependencies list
• I have added new test fixtures as needed to support added tests
• I have added or updated the documentation
• Check this box if a reviewer can merge this pull request after approval (leave it unchecked if you want to do it yourself)

Reviewer(s) checklist

• Any new user-facing content that has been added for this PR has been QA'ed to ensure correct grammar, spelling, and understandability.
• To the best of my ability, I believe that this PR represents a good solution to the specified problem and that it should be merged into the main code base.

[pdeziel]

Looks good to me, unfortunate that we have to do the key prefix stripping but I don't see any issues with the code as is.