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/service/ai/service_factory.h

@@ -10,7 +10,7 @@ namespace yaze {
 namespace cli {
 
 struct AIServiceConfig {
-  std::string provider = "mock";  // "mock", "ollama", or "gemini"
+  std::string provider = "auto";  // "auto" (try gemini→ollama→mock), "gemini", "ollama", or "mock"
   std::string model;              // Provider-specific model name
   std::string gemini_api_key;     // For Gemini
   std::string ollama_host = "http://localhost:11434";  // For Ollama