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/core/Cargo.toml

@@ -25,6 +25,7 @@ std = [
 	"hex/std",
 	"impl-serde/std",
 	"keccak-hash/std",
+	"pezkuwi-subxt-macro/std",
 	"pezkuwi-subxt-metadata/std",
 	"pezkuwi-subxt-signer/std",
 	"pezsp-core/std",
@@ -36,6 +37,12 @@ std = [
 	"serde_json/std",
 	"tracing/std",
 ]
+serde = []
+runtime-benchmarks = [
+	"pezkuwi-subxt-macro/runtime-benchmarks",
+	"pezkuwi-subxt-signer/runtime-benchmarks",
+	"pezsp-keyring/runtime-benchmarks",
+]
 
 [dependencies]
 codec = { package = "parity-scale-codec", workspace = true, default-features = false, features = ["derive"] }