docs: simplify rust benchmarks definition

Author: adriencaccia

crates/bencher_compat/README.md

@@ -13,9 +13,17 @@ Bencher compatibility layer for CodSpeed
 ## Installation
 
 ```sh
-cargo add --dev codspeed-bencher-compat
+cargo add --dev codspeed-bencher-compat --rename bencher
 ```
 
+> [!NOTE]
+> This will install the `codspeed-bencher-compat` crate and rename it to `bencher` in your `Cargo.toml`.
+> This way, you can keep your existing imports and the compatibility layer will take care of the rest.
+>
+> Using the compatibility layer won't change the behavior of your benchmark suite and Bencher will still run it as usual.
+>
+> If you prefer, you can also install `codspeed-bencher-compat` as is and change your imports to use this new crate name.
+
 ## Usage
 
 Let's start with the example from the [Bencher documentation](https://docs.rs/bencher/latest/bencher/),
@@ -51,16 +59,6 @@ name = "example"
 harness = false
 ```
 
-### Plugging CodSpeed
-
-To allow CodSpeed to interact with this suite as well, you simply need to replace
-the imports from the `bencher` crate to the `codspeed-bencher-compat` crate:
-
-```diff
-- use bencher::{benchmark_group, benchmark_main, Bencher};
-+ use codspeed_bencher_compat::{benchmark_group, benchmark_main, Bencher};
-```
-
 And that's it! You can now run your benchmark suite with CodSpeed:
 
 ```

crates/criterion_compat/README.md

@@ -13,9 +13,17 @@ Criterion.rs compatibility layer for CodSpeed
 ## Installation
 
 ```sh
-cargo add --dev codspeed-criterion-compat
+cargo add --dev codspeed-criterion-compat --rename criterion
 ```
 
+> [!NOTE]
+> This will install the `codspeed-criterion-compat` crate and rename it to `criterion` in your `Cargo.toml`.
+> This way, you can keep your existing imports and the compatibility layer will take care of the rest.
+>
+> Using the compatibility layer won't change the behavior of your benchmark suite and Criterion.rs will still run it as usual.
+>
+> If you prefer, you can also install `codspeed-criterion-compat` as is and change your imports to use this new crate name.
+
 ## Usage
 
 Let's start with the example from the [Criterion.rs documentation](https://bheisler.github.io/criterion.rs/book/getting_started.html),
@@ -48,16 +56,6 @@ name = "my_benchmark"
 harness = false
 ```
 
-### Plugging CodSpeed
-
-To allow CodSpeed to interact with this suite as well, you simply need to replace
-the imports from the `criterion` crate to the `codspeed-criterion-compat` crate:
-
-```diff
-- use criterion::{black_box, criterion_group, criterion_main, Criterion};
-+ use codspeed_criterion_compat::{black_box, criterion_group, criterion_main, Criterion};
-```
-
 And that's it! You can now run your benchmark suite with `cargo-codspeed`:
 
 ```