feat(tcp_connection): add MessagePack serialization support

- Add rmp-serde dependency for MessagePack serialization
- Implement write_msgpack and read_msgpack methods for basic MessagePack support
- Add write_large_msgpack and read_large_msgpack methods for chunked transmission
- Add error conversions for rmp-serde errors
- Add comprehensive tests for MessagePack functionality
- Fix code formatting and improve readability
- Make stream field pub(crate) for better access control

All tests pass successfully, ensuring backward compatibility.

1 files changed, 2 insertions, 0 deletions

diff --git a/crates/vcs/src/service.rs b/crates/vcs/src/service.rs
new file mode 100644
index 0000000..53365b8
--- /dev/null
+++ b/crates/vcs/src/service.rs
@@ -0,0 +1,2 @@
+pub mod server_entry;
+pub mod standard_handle;