feat: add rpc http transport package

tests/wf_transport_rpc_http/test_import_direction.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+import ast
+from pathlib import Path
+
+
+def test_wf_transport_rpc_http_imports_no_wfmcp_modules() -> None:
+    root = Path("src/wf_transport_rpc_http")
+    violations: list[str] = []
+
+    for path in root.rglob("*.py"):
+        tree = ast.parse(path.read_text(encoding="utf-8"), filename=str(path))
+        for node in ast.walk(tree):
+            if isinstance(node, ast.ImportFrom) and node.module:
+                if node.module == "wf_mcp" or node.module.startswith("wf_mcp."):
+                    violations.append(f"{path}:{node.lineno}: from {node.module}")
+            elif isinstance(node, ast.Import):
+                for alias in node.names:
+                    if alias.name == "wf_mcp" or alias.name.startswith("wf_mcp."):
+                        violations.append(f"{path}:{node.lineno}: import {alias.name}")
+
+    assert violations == []