split `examples/` into `benchmarks/` and `bins/`

new structure for the repository

• benchmarks are in ./benchmarks/ and can be run with either cargo run --package benchmarks --bin <bench> or the commands in ./benchmarks/README.md

├── Cargo.toml
├── README.md
└── src
    └── bin
        ├── commit.rs
        ├── fec.rs
        ├── linalg.rs
        ├── operations
        │   ├── curve_group.rs
        │   └── field.rs
        ├── recoding.rs
        ├── setup.rs
        └── setup_size.rs

• examples are now in ./bins/ as standalone binaries and can be run either with cargo run --package <pkg> or with the help of the cargo bin command from .nushell/cargo.nu

├── curves
│   ├── Cargo.toml
│   ├── README.md
│   └── src
│       └── main.rs
├── inbreeding
│   ├── build.nu
│   ├── Cargo.toml
│   ├── consts.nu
│   ├── mod.nu
│   ├── plot.nu
│   ├── README.md
│   ├── run.nu
│   └── src
│       ├── environment.rs
│       ├── main.rs
│       └── strategy.rs
├── rank
│   ├── Cargo.toml
│   └── src
│       └── main.rs
└── rng
    ├── Cargo.toml
    └── src
        └── main.rs

• Nushell modules are now located in ./.nushell/

changelog

apart from the changes to the general structure of the repo:

• binary.nu -> .nushell/binary.nu
• new cargo bin command from .nushell/cargo.nu
• error throw is now defined in .nushell/error.nu
• main TOML has been greatly simplified because the dependencies of "examples" have been moved to the associated crates
• the rest is basically the same but in the new structure