♻️🍱 config, cli, vanth, vanth_derive, varo: Reformatted code and added editor configuration files

- Added `.zed/settings.json` to configure rust-analyzer with `leptosfmt`.
- Created `rustfmt.toml` with max width 120 and comment wrapping settings.
- Applied consistent formatting across all modified crates using rustfmt.
- Reorganized import statements and improved code style in multiple modules.

crates/varo/tests/integration/main.rs

@@ -1,24 +1,24 @@
-use varo::{optimize, Rng, Score, Varo};
+use varo::{Rng, Score, Varo, optimize};
 
 #[test]
 fn test_optimize() {
     struct Foo {
         x: f32,
     }
-    
+
     impl Varo for Foo {
         fn next(digest: &mut varo::Rng) -> Self {
             let x = varo::rng_gen_f32(digest) * 10.0;
             Foo { x }
         }
     }
-    
+
     fn evaluate(foo: Foo) -> Score {
         let x = foo.x;
         let score = -0.9 * x.powi(3) + 2.6 * x.powi(2) - 4.0 * x;
         score.into()
     }
-    
+
     let mut rng = varo::rng_new();
     let optimization_result = optimize(evaluate, &mut rng, 10);
     assert_eq!(optimization_result.values.len(), 10);