Qwasm

- Added formatting for mutability (contributed by [AtlasQuan])
- `InitExpr` now return the initialization code (contributed by [AtlasQuan])
- Re-export all public symbols in the root module

- Many minor improvements and support for MVP WASM
- Added decoding support for MVP name section
- Added `format_function`, for formatting whole functions
- Improved `wasmdump` command-line tool

- Slight rework of meta info visibility
- Renamed `_data_meta` -> `_decoder_meta`
- Added getters `get_{meta,decoder_meta}` to `StructureData`

[AtlasQuan]: https://github.com/AtlasQuan