Add package structure and resource path utilities

- Created langbot/ package with __init__.py and __main__.py entry point
- Added paths utility to find frontend and resource files from package installation
- Updated config loading to use resource paths
- Updated frontend serving to use resource paths
- Added MANIFEST.in for package data inclusion
- Updated pyproject.toml with build system and entry points

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

pkg/core/app.py

@@ -179,8 +179,12 @@ class Application:
 
     async def print_web_access_info(self):
         """Print access webui tips"""
+        
+        from ..utils import paths
+        
+        frontend_path = paths.get_frontend_path()
 
-        if not os.path.exists(os.path.join('.', 'web/out')):
+        if not os.path.exists(frontend_path):
             self.logger.warning('WebUI 文件缺失，请根据文档部署：https://docs.langbot.app/zh')
             self.logger.warning(
                 'WebUI files are missing, please deploy according to the documentation: https://docs.langbot.app/en'

pkg/core/bootutils/files.py

@@ -19,6 +19,8 @@ required_paths = [
 
 async def generate_files() -> list[str]:
     global required_files, required_paths
+    
+    from ...utils import paths as path_utils
 
     for required_paths in required_paths:
         if not os.path.exists(required_paths):
@@ -27,7 +29,8 @@ async def generate_files() -> list[str]:
     generated_files = []
     for file in required_files:
         if not os.path.exists(file):
-            shutil.copyfile(required_files[file], file)
+            template_path = path_utils.get_resource_path(required_files[file])
+            shutil.copyfile(template_path, file)
             generated_files.append(file)
 
     return generated_files