Rework light client (#1475)

* WIP second pass over light client code for simpler API

* First pass new light client

* pub(crate) LightClientRpc::new_raw(), and fmt

* Update examples and add back a way to configure boot nodes and fetch chainspec from a URL

* Fix light client examples

* remove unused deps and tidy lightclient feature flags

* fix wasm error

* LightClientRpc can be cloned

* update light client tests

* Other small fixes

* exclude mod unless jsonrpsee

* Fix wasm-lightclient-tests

* add back docsrs bit and web+native feature flag compile error

* update book and light client example names

* fix docs

lightclient/Cargo.toml

@@ -24,23 +24,14 @@ default = ["native"]
 # Exactly 1 of "web" and "native" is expected.
 native = [
     "smoldot-light/std",
-    "tokio-stream",
-    "tokio/sync",
     "tokio/rt",
-    "futures-util",
 ]
 
 # Enable this for web/wasm builds.
 # Exactly 1 of "web" and "native" is expected.
 web = [
     "getrandom/js",
-
-    "smoldot",
     "smoldot/std",
-    "smoldot-light",
-    "tokio-stream",
-    "tokio/sync",
-    "futures-util",
 
     # For the light-client platform.
     "wasm-bindgen-futures",
@@ -56,29 +47,26 @@ web = [
 ]
 
 [dependencies]
-futures = { workspace = true }
+futures = { workspace = true, features = ["async-await"] }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["default", "raw_value"] }
 thiserror = { workspace = true }
 tracing = { workspace = true }
+smoldot-light = { workspace = true }
+tokio-stream = { workspace = true }
+tokio = { workspace = true, features = ["sync"] }
+futures-util = { workspace = true }
 
-# Light client support:
-smoldot = { workspace = true, optional = true }
-smoldot-light = { workspace = true, optional = true }
-either = { workspace = true, optional = true }
-tokio = { workspace = true, optional = true }
-tokio-stream = { workspace = true, optional = true }
-futures-util = { workspace = true, optional = true }
+# Only needed for web
 js-sys = { workspace = true, optional = true }
 send_wrapper = { workspace = true, optional = true }
 web-sys = { workspace = true, optional = true }
 wasm-bindgen = { workspace = true, optional = true }
 wasm-bindgen-futures = { workspace = true, optional = true }
+smoldot = { workspace = true, optional = true }
+pin-project = { workspace = true, optional = true }
 futures-timer = { workspace = true, optional = true }
 instant = { workspace = true, optional = true }
-pin-project = { workspace = true, optional = true }
-
-# Included if "web" feature is enabled, to enable its js feature.
 getrandom = { workspace = true, optional = true }
 
 [package.metadata.docs.rs]