Implement resource server

src/rutile/core/common.cppm

@@ -0,0 +1,12 @@
+module;
+
+export module rutile.core.common;
+
+import std;
+
+export namespace rutile
+{
+    // Alias for shared_ptr to be used for shared resource pointers (see ResourceServer)
+    template <typename T>
+    using ResourcePtr = std::shared_ptr<T>;
+}