Initial commit
Init project

main struction
REPL file and other.
Readme file update.
Chenge struct class.
Update README.md
lexer
Merge branch 'master' of https://github.com/tioover/ika
Lexer improve
fix string handle.
error handle.
token_gen function.
Change pair and Empty list.
TODO
Parser
and handle some quote.
Update README.md
Delete requirements.txt
processing '.' token.
fix bug
Merge branch 'master' of https://github.com/tioover/ika
processing `thing #(...)
move replace to parser
rewrite parser.
fix parser bug.
test repl