Multi directional arrow support in sequence diagrams

[pitecantropo]

Proposal

I think a good addition to mermaid sequence diagrams would be Multi directional arrows, such as exist in mermaid's own flowchart. This would allow illustration of to and from communication (sync between to elements).

Example

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Screenshots

Found this example, this would currently not be possible to draw with mermaid because there are no Multi directional arrows

[Ronid1]

@jgreywolf Can you please assign me? would like to work on this

[nirname]

@Ronid1 no need to assign, welcome! Start the development, and open PR as soon as you can, make it draft if it is still in progress. But this will be attached to the issue and thus you share it with the community