feat(rust): add shared Signal client and workspace configuration

rust/van_weather/Cargo.toml

@@ -6,16 +6,15 @@ description = "Fetch privacy-masked weather for a van and publish it to Home Ass
 license = "MIT"
 
 [dependencies]
-anyhow = "1.0"
-chrono = "0.4"
-clap = { version = "4.5", features = ["derive", "env"] }
-env_logger = "0.11"
-log = "0.4"
+anyhow.workspace = true
+chrono.workspace = true
+clap = { workspace = true, features = ["derive", "env"] }
+env_logger.workspace = true
+log.workspace = true
+num-traits = "0.2"
 reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "rustls-tls"] }
-serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
-
-[lints.clippy]
-all = "deny"
-pedantic = "deny"
+serde = { workspace = true, features = ["derive"] }
+serde_json.workspace = true
 
+[lints]
+workspace = true