injectable cli expression

Merged Rémi requested to merge cli_arg_test into dev


Requested by ligo run test users.
Internally, the expression is propagated from the CLI to (through options : Compiler_options.t) where the expression is compiled to Ast_core and prepended to the current file

Changelog details:

you can now pass an expression to ligo run test using command line option --arg, this value will be accessible through variable cli_arg