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.

bizinikiwi/primitives/npos-elections/Cargo.toml

@@ -38,6 +38,7 @@ std = [
 
 # Serde support without relying on std features.
 serde = [
+	"codec/serde",
 	"dep:serde",
 	"pezsp-arithmetic/serde",
 	"pezsp-core/serde",
@@ -45,3 +46,6 @@ serde = [
 	"scale-info/serde",
 ]
 runtime-benchmarks = ["pezsp-runtime/runtime-benchmarks"]
+try-runtime = [
+	"pezsp-runtime/try-runtime",
+]