Ansi c frontend rqre

[andrew-johnson-4]

Describe your changes

• c expression rendering starting to come online

int main() {
   return 0;
}

still very small, but features interact exponentially.
So small incremental improvements will reach full standard compliance quickly.

Issue ticket number and link

#1146

Checklist before requesting a review

• [ x ] I have performed a self-review of my code
• [ x ] If it is a new feature, I have added thorough tests.
• [ x ] I agree to release these changes under the terms of the permissive MIT license (1).

1. https://github.com/andrew-johnson-4/lambda-mountain/blob/main/LICENSE