RIIR epScript

[armoha]

Part of https://github.com/armoha/euddraft/issues/69 Address https://github.com/armoha/euddraft/issues/84, https://github.com/armoha/euddraft/issues/90, https://github.com/armoha/euddraft/issues/95

• PyO3 for python module
• chumsky for epScript parser
• ariadne for compiler diagnostics
• fluent for localization
  • eudplib is currently using pygettext\ https://github.com/armoha/eudplib/blob/master/eudplib/localize/ko_KR/LC_MESSAGES/eudplib.po
  • Interpolated strings are hard to localization: yeah, I'm looking on you, Dwarf Fortress!
  • Referring to https://rustc-dev-guide.rust-lang.org/diagnostics/translation.html for proper direction.