Paperclip version check

[mikroskeem]

Since PaperMC/Paperclip@726b8cc Paperclip is using properties file instead of JSON for describing patch information, which makes examining Paperclip version easy.

Possible use-cases:

• Downloading correct Paper version if currently downloaded version is not the same
• Checksumming Paper jars inside Orion

[mikroskeem]

Though care should be taken with older Paperclip jars, because that's a rather recent change...

[electron93]

@mikroskeem https://papermc.io/api/v1/paper/1.14.4 returns the list of builds and the latest one:

{
    "project":"paper",
    "version":"1.14.4",
    "builds":{
        "latest":"233",
        "all":[
            "233",
            "232",
            "231",
            "... long list ...",
            "136",
            "135"
        ]
    }
}

I also noticed that this list contains only successful builds.

I think we should save the file with the name in the format 'paper-<build_number>.jar', and check like that. Or save the current build number somewhere else.