- Implemented the `renderText` method for `VariableTag`. This method
returns the `variable` attribute of the node, i.e. `{{test}}`.
- Used the `editor.getText()` function to simply get the textual
representation of the field without relying on `editor.getJSON()` and
`parseEditorContent`.
- Implemented the RawJSON form field, which is heavily based on the
`TextVariableEditor` component.
- This component is inspired from the `RawJsonFieldInput` field,
especially the JSON validation.
Closes https://github.com/twentyhq/private-issues/issues/180
deb37edd7c