support form: integrate zenodo implementation

[kpsherva]

Information

See https://github.com/zenodo/rdm-project/issues/7

Actions

• FIX draft PR: Add custom code for support #61
• Evaluate what needs to be done to move the support form to InvenioRDM e.g migrate bootstrap to SUI, angular to react etc.
• Evaluate if it makes sense to move the support template to InvenioRDM and have each instance provide its own template or only parts of it needs to be configurable

The HTML template of the form is defined in: zenodo/modules/support/templates/zenodo_support/contact_form.html

1. The sanitization of the form data is carried on in a script defined in the same file.

The function dedicated to handling the submit and rendering the template is on: zenodo/modules/support/views.py

1. The categories of the support form are defined in the configuration of the application.
2. The handling of the template consists of performing a last check of the data, then wrap it and send it in two emails, one confirmation email for the user and another support ticket for Zenodo.