Visual data editor

[emil14]

A way to visualize messages creation

References

• https://graphqleditor.com/features/visual/
• https://graphiql-online.com/
• https://www.graphqlbin.com/v2/6RQ6TM
• https://app.graphqleditor.com/asas21222222222231453/asx123

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Related to #33, #61, #62

[emil14]

Show size

Provide the ability to see the amount of b/kb/mb used e.g. for buf of a connection or msg

Problem - implementation dependent?