fix: CI checks-quick.yml fixes

- Move .markdownlint.yaml to correct location (.github/)
- Update ensure-deps.sh for pezframe rebrand (frame -> pezframe)
- Remove duplicate dependencies in vendor crates:
  - pezkuwi-subxt-core: remove hex from dev-dependencies
  - zombienet-orchestrator: remove async-trait from dev-dependencies

vendor/pezkuwi-subxt/core/Cargo.toml

@@ -71,7 +71,6 @@ keccak-hash = { workspace = true }
 assert_matches = { workspace = true }
 bitvec = { workspace = true }
 codec = { workspace = true, features = ["bit-vec", "derive"] }
-hex = { workspace = true }
 pezkuwi-subxt-macro = { workspace = true }
 pezkuwi-subxt-signer = { workspace = true, features = ["sr25519", "subxt"] }
 pezsp-core = { workspace = true }