feat: add weights, benchmarking, mock and tests for ping and teyrchain-info pallets

- ping: weights.rs (WeightInfo trait + implementations), benchmarking.rs
  (v2-style benchmarks for start/start_many/stop/stop_all), mock.rs
  (test runtime with MockXcmSender), tests.rs (26 tests covering all extrinsics)
- teyrchain-info: mock.rs (minimal test runtime), tests.rs (7 tests for
  genesis config and ParaId getter)
- Updated ping lib.rs to use WeightInfo instead of zero weights
- Added WeightInfo = () to testing runtime Config

Cargo.lock

@@ -11244,8 +11244,11 @@ dependencies = [
  "parity-scale-codec",
  "pezcumulus-pezpallet-xcm",
  "pezcumulus-primitives-core",
+ "pezframe-benchmarking",
  "pezframe-support",
  "pezframe-system",
+ "pezsp-core",
+ "pezsp-io",
  "pezsp-runtime",
  "pezstaging-xcm",
  "scale-info",
@@ -21489,6 +21492,8 @@ dependencies = [
  "pezcumulus-primitives-core",
  "pezframe-support",
  "pezframe-system",
+ "pezsp-core",
+ "pezsp-io",
  "pezsp-runtime",
  "scale-info",
 ]