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

bizinikiwi/primitives/consensus/slots/Cargo.toml

@@ -27,9 +27,5 @@ default = ["std"]
 std = ["codec/std", "pezsp-timestamp/std", "scale-info/std", "serde/std"]
 
 # Serde support without relying on std features.
-serde = [
-	"codec/serde",
-	"dep:serde",
-	"scale-info/serde",
-]
+serde = ["codec/serde", "dep:serde", "scale-info/serde"]
 runtime-benchmarks = ["pezsp-timestamp/runtime-benchmarks"]