refactor repo architecture (!161)

## changelog
- `src/main.rs` has been moved to a new crate: `bins/saclin` which stands for **S**emi-**A**VID **CLI** in **N**ushell
- dependencies of `komodo` have been fixed
- Nushell and Rust tests have been split in the Makefile: by default, only Rust tests will run locally and Nushell tests and examples can be run manually if desired. The CI will still run everything.
- the README has been updated
- test images have been moved to `assets/`
- the majority of the old `./nu-utils/` module have been moved to internals of `./benchmarks/` and imports have been fixed
- `cargo.nu` has been moved to `./bins/` and a new `./bins/README.md` mentions it
- `./bins/saclin/` has been created and should be a self-contained Rust crate + Nushell module

.env.nu

 const MODULES = [
-    "nu-utils/math.nu",
-    "nu-utils/formats.nu",
     "benchmarks/",
 ]
 
@@ -9,8 +7,4 @@ def log-load [m: string] {
 }
 
 log-load $MODULES.0
-use $MODULES.0 *
-log-load $MODULES.1
-use $MODULES.1 *
-log-load $MODULES.2
-use $MODULES.2
+use $MODULES.0

Cargo.toml

@@ -16,15 +16,15 @@ rs_merkle = "1.4.1"
 thiserror = "1.0.50"
 tracing = "0.1.40"
 tracing-subscriber = "0.3.17"
-# `main.rs` dependencies
-ark-bls12-381 = "0.4.0"
-rand = "0.8.5"
 
 [workspace]
 members = [
     "benchmarks",
     "bins/rank",
+    "bins/saclin",
 ]
 
 [dev-dependencies]
+ark-bls12-381 = "0.4.0"
 itertools = "0.13.0"
+rand = "0.8.5"

Makefile

-.PHONY: fmt fmt-check check clippy test example show build-examples
+.PHONY: fmt fmt-check check clippy test-rs test-nu test example show build-examples
 
-DEFAULT_GOAL: fmt-check check clippy test
+DEFAULT_GOAL: fmt-check check clippy test-rs
 
 fmt-check:
 	cargo fmt --all -- --check
@@ -14,15 +14,18 @@ check:
 clippy:
 	cargo clippy --workspace --all-targets -- -D warnings
 
-test:
+test-rs:
 	cargo test --workspace --verbose
 	cargo test --examples --verbose
-	nu tests/cli.nu
-	nu tests/binary.nu
-	nu tests/color.nu
+
+test-nu:
+	nu bins/saclin/tests/cli.nu
+	nu bins/saclin/tests/binary.nu
+
+test: test-rs test-nu
 
 example:
-	nu examples/cli.nu
+	nu bins/saclin/examples/cli.nu
 
 show:
 	rustup --version

README.md

 # Komodo: Cryptographically-proven Erasure Coding
 
-## Usage
-Komodo can either be used as a library or as a binary application.
-
 ## the library
-see `cargo doc`
+see `cargo doc` or [the library itself](src/)
 
-## the binary application
-below is an example of how to use the binary application with Nushell:
-```bash
-./examples/cli.nu
+## the tests
+```shell
+make
+```
+or
+```shell
+make check clippy test-rs
 ```
 
-> **Note**  
-> requires Nushell 0.95.0 or later
+### some extra tests
+this project defines some tests written in [Nushell](https://www.nushell.sh/) to test an
+[implementation of Komodo in a CLI application](bins/saclin/).
 
-tests for the binary application can also be run with
-```bash
-nu tests/cli.nu
+If you have [Nushell installed](https://www.nushell.sh/book/installation.html), you can run these
+with the following command:
+```shell
+make test-nu
 ```
 
-## other binaries
-Komodo provides a bunch of other binaries that might be interesting of useful to use.
-
-The easiest is to use the `cargo.nu` Nushell module as follows
-```bash
-use nu-utils cargo "cargo bin"
-help cargo bin
+## examples
+A [CLI example](bins/saclin/examples/cli.nu) is also provided and can be run with
+```shell
+make example
 ```
 
 ## the benchmarks
-see [the `README`](benchmarks/README.md)
+see [`benchmarks/`](benchmarks/README.md)

benchmarks/nu-lib/commit.nu

-use ../../nu-utils log
-use ../../nu-utils math *
-use ../../nu-utils fs check-file
-use ../../nu-utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
+use utils log
+use utils math *
+use utils fs check-file
+use utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
 
 use std formats *
 

benchmarks/nu-lib/fec/plot.nu

-use ../../../nu-utils math *
-use ../../../nu-utils plot [ into-axis-options, COMMON_OPTIONS ]
-use ../../../nu-utils fs check-file
-use ../../../nu-utils plot gplt
+use ../utils math *
+use ../utils plot [ into-axis-options, COMMON_OPTIONS ]
+use ../utils fs check-file
+use ../utils plot gplt
 
 use std formats *
 

benchmarks/nu-lib/fec/run.nu

-use ../../../nu-utils log
-use ../../../nu-utils formats *
+use ../utils log
+use ../utils formats *
 
 use std formats *
 

benchmarks/nu-lib/linalg.nu

-use ../../nu-utils log
-use ../../nu-utils math *
-use ../../nu-utils fs check-file
-use ../../nu-utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
+use utils log
+use utils math *
+use utils fs check-file
+use utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
 
 use std formats *
 

benchmarks/nu-lib/recoding.nu

-use ../../nu-utils log
-use ../../nu-utils formats *
-use ../../nu-utils math *
-use ../../nu-utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
-use ../../nu-utils fs check-file
+use utils log
+use utils formats *
+use utils math *
+use utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
+use utils fs check-file
 
 use std formats *
 

benchmarks/nu-lib/setup.nu

-use ../../nu-utils log
-use ../../nu-utils math *
-use ../../nu-utils fs check-file
-use ../../nu-utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
+use utils log
+use utils math *
+use utils fs check-file
+use utils plot [ into-axis-options, COMMON_OPTIONS, gplt ]
 
 use std formats *
 

nu-utils/mod.nu → benchmarks/nu-lib/utils/mod.nu

-export module binary.nu
-export module cargo.nu
-export module color.nu
-export module error.nu
 export module formats.nu
 export module fs.nu
+export module log.nu
 export module math.nu
 export module parse.nu
 export module plot.nu
-export module log.nu

bins/README.md

+## running binaries
+If you have [Nushell](https://www.nushell.sh/) installed, the easiest is to use the `cargo.nu`
+module as follows:
+```bash
+use ./bins/cargo.nu "cargo bin"
+help cargo bin
+```