refactor: 重构 ai-core 代码结构

- 移除旧的 parser 和 grpc_server 实现
- 保留必要的配置和 proto 文件
- 删除 docker-compose.dev.yml

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ai-core/parser/__init__.py

@@ -1,9 +1,38 @@
 """
-Parser module for AI-Core document processing system.
+Parser module for WeKnora document processing system.
 
-This module provides document parsing using Microsoft MarkItDown.
+This module provides document parsers for various file formats including:
+- Microsoft Word documents (.doc, .docx)
+- PDF documents
+- Markdown files
+- Plain text files
+- Images with text content
+- Web pages
+
+The parsers extract content from documents and can split them into
+meaningful chunks for further processing and indexing.
 """
 
+from .doc_parser import DocParser
+from .docx2_parser import Docx2Parser
+from .excel_parser import ExcelParser
+from .image_parser import ImageParser
+from .markdown_parser import MarkdownParser
 from .parser import Parser
+from .pdf_parser import PDFParser
+from .registry import ParserEngineRegistry, registry
+from .web_parser import WebParser
 
-__all__ = ["Parser"]
+# Export public classes and modules
+__all__ = [
+    "Docx2Parser",
+    "DocParser",
+    "PDFParser",
+    "MarkdownParser",
+    "ImageParser",
+    "WebParser",
+    "Parser",
+    "ExcelParser",
+    "ParserEngineRegistry",
+    "registry",
+]