feat: add cApi implementation

[leyuskckiran1510]

Describe your changes

Added C implementation of server for simple REST API

Context

closes #6

Checklist before requesting a review

• [x] If it is a core feature, I have added thorough tests
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] I have only one commit (if not, squash them into one commit)

• [x] This PR is not a duplicate

[leyuskckiran1510]

@axyut could you put a hacktoberfest-accepted label to these Prs ,

[axyut]

Has the PRs not being shown in your hacktoberfest.com merged PRs count?

[leyuskckiran1510]

Has the PRs not being shown in your hacktoberfest.com merged PRs count?

yes they are shown, but still putting a label to it will make it clear, TBH