feat: 添加自启动机制，移除 --advice 参数

- 创建 bootstrap.py 承载实际 CLI 逻辑
- 重写 lyxy_document_reader.py 为轻量入口，自动检测依赖并启动
- 使用 subprocess.run() 实现跨平台兼容的自启动
- 移除 --advice 参数及相关测试
- 更新文档和规范，简化使用方式

tests/test_cli/test_main.py

@@ -4,48 +4,6 @@ import pytest
 import os
 
 
-class TestCLIAdviceOption:
-    """测试 CLI --advice 参数功能。"""
-
-    def test_advice_option_pdf(self, cli_runner):
-        """测试 -a/--advice 选项对 PDF 文件。"""
-        stdout, stderr, exit_code = cli_runner(["test.pdf", "-a"])
-
-        assert exit_code == 0
-        assert "文件类型: PDF" in stdout
-        assert "[uv 命令]" in stdout
-        assert "[python 命令]" in stdout
-
-    def test_advice_option_docx(self, cli_runner):
-        """测试 --advice 选项对 DOCX 文件。"""
-        stdout, stderr, exit_code = cli_runner(["test.docx", "--advice"])
-
-        assert exit_code == 0
-        assert "文件类型: DOCX" in stdout
-
-    def test_advice_option_url(self, cli_runner):
-        """测试 --advice 选项对 URL。"""
-        stdout, stderr, exit_code = cli_runner(["https://example.com", "--advice"])
-
-        assert exit_code == 0
-        assert "文件类型: HTML" in stdout
-
-    def test_advice_option_unknown(self, cli_runner):
-        """测试 --advice 选项对未知文件类型。"""
-        stdout, stderr, exit_code = cli_runner(["test.xyz", "--advice"])
-
-        assert exit_code != 0
-        output = stdout + stderr
-        assert "无法识别" in output or "错误" in output
-
-    def test_advice_option_xls(self, cli_runner):
-        """测试 --advice 选项对 XLS 文件。"""
-        stdout, stderr, exit_code = cli_runner(["test.xls", "--advice"])
-
-        assert exit_code == 0
-        assert "文件类型: XLS" in stdout
-
-
 class TestCLIDefaultOutput:
     """测试 CLI 默认输出功能。"""