Noir package manager

How to test

1. Get the example package example.tar.gz from tests/test_files, extract to some totally unrelated folder
2. Make sure you have everything ready for Aztec development
3. Try to compile the example with aztec-nargo compile. See that if fails miserably because of missing dependencies
4. Create an empty folder somewhere for running a local server to act as your package repository
5. Copy the package packages from tests/test_files to your empty folder
6. Extract the package: tar -xvf packages
7. Start a local HTTP server from that folder, for example with python3 -m http.server 8888
8. Compile this tool: cargo build --release
9. Copy the binary noir-libs from target/release folder into your example folder
10. In your example folder, start adding the needed dependencies:
    1. ./noir-libs add [email protected]
    2. ./noir-libs add [email protected]
    3. ./noir-libs add [email protected]
11. Compile again with aztec-nargo compile