[WIP] [GR-32682] Operations DSL

[graalvmbot]

This is experimental and undocumented code shared with the community for feedback. It contains an implementation of the new Truffle Operation DSL, which generates full bytecode interpreters.

There is a talk available to explain its rationale: https://www.youtube.com/watch?v=8cNvs7Ff2Ic

[GavinRay97]

This is super cool!

[chumer]

This work is continued here: https://github.com/oracle/graal/pull/6697