this is to avoid having to change the toolchain in the CI everytime.

`rust-toolchain.toml` and `.gitlab-ci.yml` will have to be updated in pairs when bumping / changing the Rust toolchain.

this should avoid the following error when trying to rust the LSP in a toolchain which does not have the `rust-analyzer` component and without running `rustup component add rust-analyzer` manually:
```
error: Unknown binary 'rust-analyzer' in official toolchain 'stable-x86_64-unknown-linux-gnu'.
```

FRI protocol from [`dragoon/fri`](https://gitlab.isae-supaero.fr/dragoon/fri)

## changelog
- add binary assets to be used as inputs
- add `fri` and `fri_test_utils` as local dependencies until [`dragoon/fri`](https://gitlab.isae-supaero.fr/dragoon/fri) becomes public
- add `fri` feature and module (see section below for the public definitions)
- fix bug in 32bd6566
- bump Rust in e7a2c244
- add a versatile example
- add Nushell pipeline to run benchmarks and plot results
- add some tests

## `fri` module API
```rust
struct Block<F: PrimeField, H: Hasher>
```

```rust
fn evaluate<F: PrimeField>(bytes: &[u8], k: usize, n: usize) -> Vec<Vec<F>>
```

```rust
fn encode<F: PrimeField>(
    bytes: &[u8],
    evaluations: Vec<Vec<F>>,
    k: usize,
) -> Vec<fec::Shard<F>>
```

```rust
fn prove<const N: usize, F: PrimeField, H: Hasher, P>(
    evaluations: Vec<Vec<F>>,
    shards: Vec<fec::Shard<F>>,
    blowup_factor: usize,
    remainder_plus_one: usize,
    nb_queries: usize,
) -> Result<Vec<Block<F, H>>, KomodoError>
where
    P: DenseUVPolynomial<F>,
    for<'a, 'b> &'a P: Div<&'b P, Output = P>,
    <H as rs_merkle::Hasher>::Hash: AsRef<[u8]>,
```

```rust
fn verify<const N: usize, F: PrimeField, H: Hasher, P>(
    block: Block<F, H>,
    domain_size: usize,
    nb_queries: usize,
) -> Result<(), KomodoError>
where
    P: DenseUVPolynomial<F>,
    for<'a, 'b> &'a P: Div<&'b P, Output = P>,
    <H as rs_merkle::Hasher>::Hash: AsRef<[u8]>,
```

```rust
fn decode<F: PrimeField, H: Hasher>(blocks: Vec<Block<F, H>>, n: usize) -> Vec<u8>
```

## results

### times

![evaluating](/uploads/69607a2f987e26c23dd172d469c682c5/evaluating.png)
![encoding](/uploads/540ac15c21ba7500ad34b068c5d9d7dc/encoding.png)
![proving](/uploads/a694525c7d1277fe0b53dd87b6443900/proving.png)
![verifying_single](/uploads/8f03a3a0abca329eea396f3ba8b76512/verifying_single.png)
![decoding](/uploads/ba2cb0aa54f2ecff16340333121f16ca/decoding.png)

### sizes

![commits_single](/uploads/59a96661482fb1d918efc098e060cd45/commits_single.png)
![commits_single_normalized](/uploads/11398ed3f37ab4917b717cb717c9070d/commits_single_normalized.png)
![proofs](/uploads/17da07f4ef4ee637236deba7835cc022/proofs.png)
![proofs_normalized](/uploads/b2aae9491c56767ad1bf5674cf980361/proofs_normalized.png)

!39 and !40 changed the CI to use a _toolchain_ file.

however, having `default` as the `$.profile` causes extra useless components to be installed.

this MR sets the `$.profile` to `minimal` in the _toolchain_ file and the `$.components` to `rustfmt` and `clippy`.

fix the toolchain version of Rust with `rust-toolchain.toml`.

this is to avoid having things like `cargo clippy` behaving differently locally and in the remote CI.
> **Note**  
> see https://gitlab.isae-supaero.fr/dragoon/komodo/-/jobs/12875 which fails with Rust 1.72 but works locally with Rust 1.75