refactor(editor): extract editor management responsibilities into dedicated classes

- Introduced EditorRegistry, ProjectManager, and RomFileManager to streamline editor operations and improve code organization.
- Refactored EditorManager to delegate responsibilities to the new classes, enhancing maintainability and clarity.
- Updated CMake configuration to include new source files for the extracted components.

Benefits:
- Improves separation of concerns within the editor, leading to a more modular and manageable codebase.
- Enhances the overall architecture by clearly defining roles for editor management, project handling, and ROM file operations.

src/app/editor/ui/session_coordinator.cc

@@ -445,6 +445,34 @@ void SessionCoordinator::RenameSession(size_t index, const std::string& new_name
   printf("[SessionCoordinator] Renamed session %zu to '%s'\n", index, new_name.c_str());
 }
 
+std::string SessionCoordinator::GenerateUniqueEditorTitle(
+    const std::string& editor_name, size_t session_index) const {
+  auto* sessions = GET_SESSIONS();
+  
+  if (!sessions || sessions->size() <= 1) {
+    // Single session - use simple name
+    return editor_name;
+  }
+
+  if (session_index >= sessions->size()) {
+    return editor_name;
+  }
+
+  // Multi-session - include session identifier
+  const auto& session = sessions->at(session_index);
+  std::string session_name = session.custom_name.empty() 
+      ? session.rom.title() 
+      : session.custom_name;
+
+  // Truncate long session names
+  if (session_name.length() > 20) {
+    session_name = session_name.substr(0, 17) + "...";
+  }
+
+  return absl::StrFormat("%s - %s##session_%zu", editor_name, session_name,
+                         session_index);
+}
+
 void SessionCoordinator::SetActiveSessionIndex(size_t index) {
   SwitchToSession(index);
 }

src/app/editor/ui/session_coordinator.h

@@ -69,6 +69,7 @@ class SessionCoordinator {
   std::string GetSessionDisplayName(size_t index) const;
   std::string GetActiveSessionDisplayName() const;
   void RenameSession(size_t index, const std::string& new_name);
+  std::string GenerateUniqueEditorTitle(const std::string& editor_name, size_t session_index) const;
   
   // Session state management
   void SetActiveSessionIndex(size_t index);