feat: port el-ui vessels — rename crates→vessels, add El source + manifests

ui/vessels/el-config/src/lib.rs

@@ -0,0 +1,42 @@
+//! el-config — Layered, typed configuration for el-ui applications.
+//!
+//! ## Resolution order (highest priority wins)
+//!
+//! 1. Environment variables (`EL_APP_NAME=...`)
+//! 2. `.env` file (development only)
+//! 3. `el.toml` `[env.<current>]` section
+//! 4. `el.toml` `[config]` base section
+//! 5. Defaults defined in code
+//!
+//! ## Quick start
+//!
+//! ```
+//! use el_config::prelude::*;
+//!
+//! let mut cfg = Config::new(Environment::Development);
+//! let mut defaults = std::collections::HashMap::new();
+//! defaults.insert("app.name".to_string(), "MyApp".to_string());
+//! defaults.insert("server.port".to_string(), "8080".to_string());
+//! cfg.set_defaults(defaults);
+//!
+//! let name = cfg.get::<String>("app.name").unwrap();
+//! let port = cfg.get::<u32>("server.port").unwrap();
+//! assert_eq!(name, "MyApp");
+//! assert_eq!(port, 8080);
+//! ```
+
+#![deny(warnings)]
+
+pub mod config;
+pub mod env;
+pub mod error;
+pub mod source;
+
+pub mod prelude {
+    pub use crate::config::{load_from_toml, Config};
+    pub use crate::env::Environment;
+    pub use crate::error::ConfigError;
+    pub use crate::source::{ConfigSource, EnvVarSource, FromConfigStr, MapSource};
+}
+
+pub use prelude::*;