Add pose data for 6-head and 7-head character models

- Created `6heads.json` containing pose data for 6-head characters, including body, hand, and face coordinates.
- Created `7heads.json` containing pose data for 7-head characters, with similar structure and details.
- Both files include metadata such as format, version, export date, and descriptions.

app.py

@@ -292,7 +292,7 @@ def main():
                 }
                 
                 if template_name in template_file_map:
-                    templates_path = os.path.join(os.path.dirname(__file__), template_file_map[template_name])
+                    templates_path = os.path.join(os.path.dirname(__file__), "poses", template_file_map[template_name])
                     with open(templates_path, "r", encoding="utf-8") as f:
                         pose_data = json.load(f)
                 else: