Certifier: bundle README.md with generated Agda certificate

[ana-pantilie]

Fixes https://github.com/IntersectMBO/plutus-private/issues/2185

[zliu41]

All these backslashes makes this quite hard to maintain. This is mostly static text, the only dynamic part is name, but I don't think you really need it to be dynamic. You can just make a static readme and load it with file-embed.

[zliu41]

Even if you really want the dynamic name, you can easily do a Text.replace.

[zliu41]

I'm not sure if data-files works. @zeme-wana What do you think? You mentioned this before about data-files:

They do in CI. But once the executable is built and deployed to some machine, the files are nowhere to be found

In any case, this is exactly what file-embed is designed to do, and that definitely works.

[zliu41]

Yeah, since we release uplc as a single executable, this can't work. You need to use file-embed.

[ana-pantilie]

@zliu41 I'm now getting https://ci.iog.io/build/12767781/nixlog/18 which I'm unable to reproduce locally.

@zeme-wana said that there might be platform specific issues with this approach, so I'm going to just use the original version, which was to embed the file into a Haskell string. It's much simpler, the file isn't that large, we won't have to change it too often and I think we've already spent too much time on this.