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.

pezbridges/relays/messages/Cargo.toml

@@ -38,3 +38,10 @@ runtime-benchmarks = [
 	"pezbp-messages/runtime-benchmarks",
 	"relay-utils/runtime-benchmarks",
 ]
+std = [
+	"pez-finality-relay/std",
+	"pezsp-core/std",
+	"relay-utils/std",
+	"tracing/std",
+]
+serde = []