feat(phase4): complete zclaw-skills, zclaw-hands, zclaw-channels, zclaw-protocols 模块实现

crates/zclaw-protocols/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "zclaw-protocols"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+description = "ZCLAW protocol support (MCP, A2A)"
+
+[dependencies]
+zclaw-types = { workspace = true }
+
+tokio = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+tracing = { workspace = true }
+async-trait = { workspace = true }
+reqwest = { workspace = true }