feat: split packages, add better devnet deployment system

[thehowl]

GnoChess is now split into a few components:

• realm -> gno.land/r/demo/chess
• package -> gno.land/p/demo/chess
• package/glicko2 -> gno.land/p/demo/chess/glicko2
• package/zobrist -> gno.land/p/demo/chess/zobrist

Thanks to gnodev, getting these combined together is quite straightforward. I reorganised the makefile so that the full gnochess stack can be started up with three commands, none of them with docker, weird patches on gno:

Outstanding items:

• Make docker deployment work still (but target it more for a production-demo)
• Represent moved JSON marshalers better
• Document in README

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[thehowl]

this needs some work on the CI & makefile still