add router core

Cargo.toml

@@ -4,6 +4,7 @@ members = [
     "packages/dioxus",
     "packages/core",
     "packages/core-macro",
+    "packages/router-core",
     "packages/router",
     "packages/html",
     "packages/hooks",
@@ -63,4 +64,4 @@ env_logger = "0.9.0"
 [profile.release]
 opt-level = 3
 lto = true
-debug = true
+debug = true