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.

pezkuwi/node/core/runtime-api/Cargo.toml

@@ -48,3 +48,11 @@ runtime-benchmarks = [
 	"pezsp-consensus-babe/runtime-benchmarks",
 	"pezsp-keyring/runtime-benchmarks",
 ]
+std = [
+	"gum/std",
+	"pezkuwi-node-metrics/std",
+	"pezkuwi-node-subsystem-types/std",
+	"pezkuwi-node-subsystem/std",
+	"pezkuwi-pez-node-primitives/std",
+]
+serde = []