interpreter: fix size_t formatting in string_format

setup: print token with loc on BOSON_STAGE lex

lexer: fix lineno on push_back

setup: lowercase BOSON_STAGE env var value

lexer: lex T_EQ

ast: rename ast_expression_to_str function to ast_expression_str

parser: copy location onto ast

lexer: add location to string function

parser: parse number

lexer: lex number

parser: improve error message

lexer: parse multiple comment lines

output log cleanup

README: update build instructions

builtin/executable: use strdup to copy file string

use strdup to duplicate strings

builtin/project: fix key value sscanf buffer overflow

build: use .builds to store temp files

rework lexer and parser

README: remove extra "in"