[code] restructured into different crates

Cargo.toml

@@ -1,23 +1,18 @@
-[package]
-name = "lanspread"
-version = "0.1.0"
-edition = "2021"
+[workspace]
+members = [
+    "crates/lanspread-db",
+    "crates/lanspread-server",
+    "crates/lanspread-client"
+]
+resolver = "2"
 
-[[bin]]
-name = "server"
-path = "src/bin/server.rs"
-
-[[bin]]
-name = "client"
-path = "src/bin/client.rs"
-
-[dependencies]
-bytes = "1.7.2"
-clap = "4.5.18"
-eyre = "0.6.12"
+[workspace.dependencies]
+bytes = "1.8"
+clap = "4.5"
+eyre = "0.6"
 itertools = "0.13"
-s2n-quic = "1.47.0"
+s2n-quic = "1.49"
 semver = "1.0"
-serde = { version = "1.0.210", features = ["derive"] }
-serde_json = "1.0.128"
-tokio = { version = "1.40.0", features = ["full"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tokio = { version = "1.41", features = ["full"] }