feat: Add overworld sprite and entrance commands to agent tool

- Implemented new commands for listing overworld sprites and retrieving entrance details.
- Enhanced CLI functionality to support filtering by map, world, and sprite ID with JSON and text output formats.
- Introduced tile statistics analysis command for detailed tile usage insights.
- Updated function schemas and system prompts to reflect the new commands and their parameters.

src/cli/handlers/message.cc

@@ -43,7 +43,8 @@ absl::StatusOr<Rom> LoadRomFromFlag() {
 }
 
 std::vector<editor::MessageData> LoadMessages(Rom* rom) {
-  return editor::ReadAllTextData(rom->data(), editor::kTextData);
+  // Fix: Cast away constness for ReadAllTextData, which expects uint8_t*
+  return editor::ReadAllTextData(const_cast<uint8_t*>(rom->data()), editor::kTextData);
 }
 
 }  // namespace