Add CONTRIBUTING.md page

[nirs]

Currently we have a link to https://lima-vm.io/docs/community/contributing/ which is useful for in the context of the lima-vm projects, but we need info related to this project.

Tasks:

• How to install required development tools (e.g. brew install ...)
• How to test locally running socket_vmnet source
• How to run the performance tests

[kairveeehh]

hii @nirs I would like to solve this issue , please let me know more details around it