feat(jdtls): include a decompiler (quiltflower) with jdtls

[jay-babu]

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This can be a separate package, but the jar is very small 997k

[jay-babu]

fernflower is what people commonly use. It is used to decompile library code. There aren't many references to it, but it is used widely. Essentially to look at the source code from a compiled jar or attempt to do so, since it's a decompiler.

[williamboman]

I see, thanks! To me it sounds like it doesn't have an apparent connection to jdtls, let's make it its own package imo!