refactor: Update TUI Includes for Improved Organization

- Replaced instances of "cli/tui.h" with "cli/tui/tui.h" across multiple TUI source files, enhancing file organization and clarity.
- Updated include paths in general_commands.cc to reflect the new structure, ensuring consistency across the codebase.

src/cli/tui/command_palette.cc

@@ -5,7 +5,7 @@
 #include <ftxui/component/screen_interactive.hpp>
 #include <ftxui/dom/elements.hpp>
 
-#include "cli/tui.h"
+#include "cli/tui/tui.h"
 #include "cli/handlers/agent/hex_commands.h"
 #include "cli/handlers/agent/palette_commands.h"
 #include "absl/strings/str_split.h"