feat(deps): add commons crate for shared utilities

Add commons v0.0.1 with error and validation features to standardize
error handling and validation across the Sebastien Rousseau crate ecosystem.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: sebastienrousseau

Cargo.toml

@@ -55,6 +55,7 @@ path = "examples/cmn.rs"
 # Dependencies for the library
 serde = { version = "1.0.217", features = ["derive"] }
 serde_json = "1.0.137"
+commons = { git = "https://github.com/sebastienrousseau/commons", tag = "v0.0.1", default-features = false, features = ["error"] }
 
 [dev-dependencies]
 # Dependencies for testing