refactor: Restructure CLI File Organization and Update Includes

- Updated CMakeLists.txt to reflect new file paths for CLI components, enhancing project organization.
- Replaced instances of the deprecated z3ed.h with cli.h across multiple handler files, improving code consistency and maintainability.
- Organized CLI source files into a dedicated directory structure for better modularity and clarity.

src/cli/tui/tui.cc

@@ -13,7 +13,7 @@
 #include "util/file_util.h"
 #include "app/core/asar_wrapper.h"
 #include "app/zelda3/overworld/overworld.h"
-#include "cli/modern_cli.h"
+#include "cli/cli.h"
 #include "cli/tui/command_palette.h"
 #include "cli/z3ed_ascii_logo.h"
 #include "cli/service/agent/simple_chat_session.h"