- add support for Lua clousure, C Clousure and Upvalue.
- verify instruction generated by loop and goto statement.
- add linux platform support.
- refactor
StrImpl
withBox<str>
instead of flexiable array.
- refactor codegen to support more feature.
- support of dumping a proto to binary and human-readable format.
- an usable thr-color GC with tests.