Results 2 issues of Zhuofu Chen

I followed the building instructions and installed the runwasi tools locally. The `make check` and `mae test` executed successfully. ```plain vagrant@vagrant:~/runwasi$ make check cargo fmt --all -- --check cargo clippy...

## Motivation In WasmEdge C-SDK, there is no provisioned method to remove the modules registerd by VM. I can understand the reason is that it's vm owns those modules. However...

enhancement
good first issue
feature
c-CAPI