fix: comprehensive feature propagation and dep:serde fixes

- Fix serde optional dependency issues by adding dep:serde to serde features (24 crates)
- Run zepter to propagate runtime-benchmarks, std, try-runtime, serde, experimental, with-tracing, tuples-96 features
- Regenerate umbrella crate with proper feature propagation
- Format all TOML files with taplo

This resolves check-umbrella and check-zepter CI failures.

vendor/pezkuwi-subxt/lightclient/Cargo.toml

@@ -40,6 +40,16 @@ web = [
 	"web-sys",
 	"web-time",
 ]
+std = [
+	"futures-util/std",
+	"getrandom?/std",
+	"serde/std",
+	"serde_json/std",
+	"smoldot-light/std",
+	"smoldot?/std",
+	"tracing/std",
+]
+serde = []
 
 [dependencies]
 futures = { workspace = true, features = ["async-await"] }