Replace nimscript with other scripting mechanism

[Nimaoth]

Nimscript has cause numerous issues over time, and is not usable with chronos due to gcsafe issues.
Performance is also not great, and compile times are increased because part of the nim compiler is shipped.

Alternatives:

• Lua

  • https://github.com/nim-lang/lua
  • or https://github.com/jangko/nimLUA
  • or https://github.com/glassesneo/spellua

• Run nimscript in DLL plugin

  • We could still use nimscript but compile it to a separate dll (requires exposing plugin api to dynamic libraries, but should be pretty easy)
    That would avoid gcsafe issues and increased compile times (the dll just needs be compiled once and then would rarely change)

[SolitudeSF]

here is newer luajit wrapper https://github.com/glassesneo/spellua