Support pasting images in markdown files about lepton

[knugie]

💡 Adding images as files in the user's gist might work (https://docs.github.com/en/rest/reference/gists#create-a-gist). Those images could then be referenced with their raw_url in md file, e.g. https://gist.github.com/knugie/55b6e043dee0a1781810db2131ed89fb

I know the result is not the same, but I would be totally happy with that, plus it even adds to offline usage convenience and portability capabilities. 🤷

[knugie]

On a more technical note

✅ As far as I can tell, Electron supports pasting image content https://www.electronjs.org/docs/latest/api/clipboard#clipboardreadimagetype

🤔 However, it looks like there is a major technical obstacle: GitHub doesn't support uploading image content programatically - isaacs/github#1133
People have been looking into workarounds for that, but hosting Lepton users' images in e.g. a hackjutsu repo would break a couple of Lepton's core concepts https://gist.github.com/maxisam/5c6ec10cc4146adce05d62f553c5062f

[hackjutsu]

Thanks for the research. Image hosting is a blocker and I'm hesitant to introduce a Lepton-specific solution. But if someone implements what @knugie suggests above, I'm happy to add it behind a .leptronrc config.

[uwezi]

I would absolutely support @knugie 's suggestion. Currently I am opening the gist in a browser window directly after creating it with lepton, and then I add the image there - however, the big disadvantage I see there is that the image itself is not included when you later download the gist from Github again. Having the image file as part of the gist would make sure that they stay together.