feat: add lib.rs with gated child crates

This allows for Wasm Workers Consumers to depend on the toplevel WWS
crate as a library, gating different features behind cargo features.

Cargo.toml

@@ -37,6 +37,12 @@ wws-project = { workspace = true }
 reqwest = { version = "0.11", features = ["blocking"] }
 
 [features]
+default = ["all"]
+all = ["wws_config", "wws_router", "wws_server"]
+wws_config = []
+wws_router = []
+wws_server = []
+
 vendored-openssl = ["wws-project/vendored-openssl"]
 
 [workspace]

src/lib.rs

@@ -0,0 +1,9 @@
+// Copyright 2023 VMware, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+#[cfg(feature = "wws_config")]
+pub use wws_config;
+#[cfg(feature = "wws_router")]
+pub use wws_router;
+#[cfg(feature = "wws_server")]
+pub use wws_server;