✨🧪💩➕➖ workspace, vanth, varo: Add varo crate and Root struct, update dependencies

- Replaced `bitcode` crate with `bincode` in workspace dependencies.
- Added new crate `varo` for random optimization with `Varo` trait, `Distribution`, and `optimize` function.
- Defined `Root` world struct placeholder in `vanth` crate.
- Created `reference.rs` test module in `vanth` with custom components and events.
- Added TODOs in `varo` for RNG implementation and `optimize` function.

Cargo.toml

@@ -10,7 +10,7 @@ edition = "2024"
 clap = { version = "4.5.42", features = ["derive"] }
 bevy_app = "0.16.1"
 bevy_ecs = "0.16.1"
-bitcode = "0.6.6"
+bincode = "2.0.1"
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 digest = "0.10.7"
@@ -21,3 +21,4 @@ proc-macro2 = "1.0"
 sqlx = "0.8.6"
 rusqlite = { version = "0.32.1", features = ["bundled"] }
 tempfile = "3.12.0"
+rand_core = "0.9.3"