fix: quick-checks CI failures - taplo format, zepter, umbrella

1. TOML format (taplo): 123 files reformatted using correct config
   - Command: taplo format --config .config/taplo.toml

2. Zepter feature propagation fix:
   - pezframe-support: added pezsp-timestamp/try-runtime to try-runtime feature

3. generate-umbrella.py bug fix:
   - Script crashed when Cargo.toml/src didn't exist in umbrella dir
   - Added existence checks before deletion

pezkuwi/node/core/pvf/prepare-worker/Cargo.toml

@@ -53,9 +53,5 @@ runtime-benchmarks = [
 	"pezkuwi-primitives/runtime-benchmarks",
 	"pezkuwichain-runtime/runtime-benchmarks",
 ]
-std = [
-	"codec/std",
-	"gum/std",
-	"pezkuwi-node-core-pvf-common/std",
-]
+std = ["codec/std", "gum/std", "pezkuwi-node-core-pvf-common/std"]
 serde = []

pezkuwi/node/subsystem/Cargo.toml

@@ -21,7 +21,4 @@ runtime-benchmarks = [
 	"pezkuwi-node-subsystem-types/runtime-benchmarks",
 	"pezkuwi-overseer/runtime-benchmarks",
 ]
-std = [
-	"pezkuwi-node-subsystem-types/std",
-	"pezkuwi-overseer/std",
-]
+std = ["pezkuwi-node-subsystem-types/std", "pezkuwi-overseer/std"]

pezkuwi/node/zombienet-backchannel/Cargo.toml

@@ -31,7 +31,5 @@ tokio-tungstenite = { workspace = true }
 
 [features]
 runtime-benchmarks = ["gum/runtime-benchmarks"]
-std = [
-	"gum/std",
-]
+std = ["gum/std"]
 serde = []