add chat Render "danmaku" style

[ohnonX]

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• I have checked the issue page for duplicates
• I am running the latest version (download here)

Write your feature request here

I am japanese edditor for twitch streamer. and also using this soft for year and I am thinking, IF this chat render has danmaku style it has to be massive succes in japanese stream culture and clip videos . this could be massive commercial success as editor I felt. so please let you think adding this.

[superbonaci]

Do you have any video that already does the danmaku style to show off?
For example any youtube or twitch video what we can see.

Something like this: https://www.danmage.com/

The comments have to slide or clone themselves, or how is that supposed to work?