[DOC] Add docs for cargo near new template

[PiVortex]

Documentation Type

New Documentation

What needs documentation?

We never added docs for https://github.com/near/cargo-near-new-project-template ! This is a good way to get up and started with creating near contracts in rust and using the cli if you just want to try things out without installing anything.

Acceptance Criteria

• Add using this template to the quickstart

Resources & References

https://github.com/near/cargo-near-new-project-template

Priority

🟠 P1 : Important Documentation Gap