[chore](root): add trx-protocol to workspace

Update workspace Cargo.toml to include new trx-protocol crate
and update Cargo.lock with new dependencies.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

Cargo.toml

@@ -5,6 +5,8 @@
 [workspace]
 members = [
     "src/trx-ft8",
+    "src/trx-core",
+    "src/trx-protocol",
     "src/trx-server",
     "src/trx-server/trx-backend",
     "src/trx-server/trx-backend/trx-backend-ft817",
@@ -14,7 +16,6 @@ members = [
     "src/trx-client/trx-frontend/trx-frontend-http",
     "src/trx-client/trx-frontend/trx-frontend-http-json",
     "src/trx-client/trx-frontend/trx-frontend-rigctl",
-    "src/trx-core",
 ]
 resolver = "2"