Documentation: Comparison and design decision of other "languages"

[DonaldTsang]

It might be a good idea to compare JSON5 with the features of these languages (and of course YAML, TOML, CSON, INI and others that are popular)

• https://github.com/dhall-lang/dhall-lang
• https://github.com/hashicorp/hcl
• https://github.com/archipaorg/icl
• https://github.com/mrkkrp/liaison
• https://github.com/ron-rs/ron
• https://github.com/svenvc/ston
• https://github.com/Sygmei/Vili

[jordanbtucker]

I think this belongs in the Wiki.