Allow to add a link in a solid-form-richtext

Edit: it seems that the solid-form-richtext does the job. However, it's impossible to add a link. We should have a look to our richtext plugin to see if the option is available

What needs to be done?

We can already use solid-display-value-markdown to display a markdown formatted text into HTML. It would be very useful to have a solid-form-textarea-markdown that allow user to edit this field consistently. The benefits would be :

1. let the user know that Markdown is available for this field, and provide dome hint on how to use it
2. provide formatting helper buttons
3. provide a preview interface

Targeted application

Requested by @alex for project Hubl (issue management/startinblox-feature-requests#4 (closed))

Technical details

That could be very simple. Example interfaces :

Gitlab:

Rocket Chat:

CodiMD:

Links

• management/startinblox-feature-requests#4 (closed)

How to complete

1. How to complete a Feature
2. Ask any question you have in the issue comments before starting
3. Create a new branch named ${ISSUE_NUMBER}-issue-name
4. Implement a simple test to illustrate the desired functionality
5. Write some code to complete this task
6. Write some additional tests to cover edge cases and some possible errors
7. Write documentation about what have you done and why you have done it this way
8. Submit a merge request