Build a cant-be-simpler intepreter with rust

credits to https://interpreterbook.com/

for demo: cargo run

• features:
  • Expressions
  • Statements
  • Let / reassignment
  • If - else if - else
  • functions / builtins
  • closures
  • Basic types and operators
    • int
    • string
    • bool
    • null
    • array
    • object