Add datalink-provider crate for real-world AIS data handling

- Introduced a new crate, `datalink-provider`, to support real AIS data sources (serial, TCP/UDP, file replay).
- Integrated it into the workspace and used it in the `AIS` system, replacing the simulation datalink.
- Updated dependencies and lock file.

crates/datalink-provider/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "datalink-provider"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+datalink = { path = "../datalink" }
+tokio = { version = "1.0", features = ["full"] }
+tokio-serial = "5.4"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+thiserror = "1.0"
+log = "0.4"
+bytes = "1.0"
+futures = "0.3"