[Feature]: C/C++ demos for non-Windows developers

[rjzak]

Is there an existing issue for this?

• [X] I have searched the existing issues

Description

The tutorials for C/C++ are oddly Windows-centric. Despite some instructions for compiling with gcc, g++ on Linux, the instructions point users to https://docs.microsoft.com/en-us/cpp/build/vscpp-step-0-installation?view=msvc-170

Acceptance Criteria

The introductions should break-down the instructions by operating system. The wasi-sdk supports Linux & macOS.

• Instructions for mac OS (install Xcode, for example)
• Instructions for Linux (use your package manager to install clang, for example)

Suggestions for a technical implementation

No response

[Deepansharora27]

I can make this change and add instructions for different Operating Systems

[Deepansharora27]

I made a PR #174 in an attempt to fix this. This PR is for C right now, I will make a PR for cpp as well soon.

@rjzak Richard, Should I add anything else to the guide ?

[rjzak]

@Deepansharora27 Looks good!