devx: Enable Usage as a Library

[AbdelStark]

Description

Allow cairo-zig to be used as a library.

Acceptance Criteria

• Provide example code in examples folder for library usage
• Update documentation to include library installation and usage instructions

[github-actions]

There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.
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Because this issue is marked as stale, it will be closed and locked in 7 days if no further activity occurs.
Thank you for your contributions!

[TobieTom]

Could I take over this issue? I am currently new but already have experience from a Starknet Jigsaw Puzzle game and would love to add this to my experience on starknet chain. I also noticed that the issue would be marked as stale in 7 days by github actions