feat: add plugin websocket host api

crates/pod/Cargo.toml

@@ -39,6 +39,7 @@ session-metrics = { workspace = true }
 arc-swap = "1.9.1"
 wasmi = { version = "0.51.1", default-features = false, features = ["std", "extra-checks"] }
 wasmtime = { version = "45.0.2", default-features = false, features = ["std", "runtime", "cranelift", "component-model"] }
+tungstenite = { version = "0.28.0", default-features = false, features = ["handshake", "native-tls", "url"] }
 
 [dev-dependencies]
 dotenv = "0.15.0"

crates/pod/src/pod.rs

@@ -5379,6 +5379,7 @@ permission = "read"
                 ingresses: vec![],
                 permissions: vec![],
                 request: vec![],
+                websocket: vec![],
             },
             enabled_surfaces: vec![manifest::plugin::PluginSurface::Hook],
             grants: manifest::plugin::PluginGrantConfig::default(),