merge human-pane, source-pane and mardown-pane

[bourgeoa]

these panes are related to text/xxx content.

The merged pane could automatically display the content depending on content-type. The edit button will display the raw text and validate will check and display the content based on content-type

There may be a need to keep text/html apart to keep the pod web server function.

[bourgeoa]

Merging makdown-pane and human-pane see PR https://github.com/solid/solid-panes/pull/316

[bourgeoa]

The panes relates to the following categories :

• serialized linked data : text/.ttl, .jsonld, .n3, ....
• text/html or folder dokieli : RDFa non serializable linked data
• other text/xxx : like text/plain, text/mardown
• container representation/administration : folder-pane, table-pane
• medias
• apps : can be anything -- index.html based : the container is displayed as a traditional web app -- index.ttl based : the conatainer is displayed as a SolidOS web app (contacts, chat, .....)

Actually we have :

• an editable pane : source-pane
• dokieli-pane and human-pane that differ because dokieli has a linked-data content : why not merge ?
• folder-pane for container representation
• markdown-pane with edit/save buuton : can it be merged in human-pane ?
• linked data for human
• linked data serialized representation in RDF, N3 : could it be on pane with multiple representation ?