refactor: 删除冗余 cli 入口脚本, gittool 用数组配置 clean excludes

1. 删除 13 个已有 YAML 配置的 cli .py 入口脚本, 统一通过 pf 调用
2. gittool.yaml 用 CLEAN_EXCLUDES 数组变量配置 git clean 的 -e 参数,
   保留 .venv/.tox/node_modules/.idea 等目录避免误删
3. run_cli 执行前打印调用信息: [gittool] 执行: c
4. 更新 pyproject.toml 移除 13 个冗余 entry points, 仅保留 pf
5. 清理测试文件中的 TestMain 类 (测 _ops 模块的测试保留)

tests/cli/test_piptool.py

@@ -6,8 +6,6 @@ import subprocess
 from pathlib import Path
 from unittest.mock import MagicMock, patch
 
-import pyflowx as px
-from pyflowx.cli import piptool
 from pyflowx.cli._ops import dev
 
 
@@ -204,52 +202,3 @@ class TestPipFreeze:
             mock_run.return_value = MagicMock(stdout="numpy==1.0.0\npandas==2.0.0", returncode=0)
             dev.pip_freeze()
             assert mock_run.called
-
-
-# ---------------------------------------------------------------------- #
-# main function
-# ---------------------------------------------------------------------- #
-class TestMain:
-    """Test main function."""
-
-    def test_main_install_command(self) -> None:
-        """main() should handle install command."""
-        with patch("sys.argv", ["piptool", "i", "numpy", "pandas"]), patch.object(px, "run") as mock_run:
-            piptool.main()
-            assert mock_run.called
-
-    def test_main_uninstall_command(self) -> None:
-        """main() should handle uninstall command."""
-        with patch("sys.argv", ["piptool", "u", "numpy"]), patch.object(px, "run") as mock_run:
-            piptool.main()
-            assert mock_run.called
-
-    def test_main_reinstall_command(self) -> None:
-        """main() should handle reinstall command."""
-        with patch("sys.argv", ["piptool", "r", "numpy"]), patch.object(px, "run") as mock_run:
-            piptool.main()
-            assert mock_run.called
-
-    def test_main_download_command(self) -> None:
-        """main() should handle download command."""
-        with patch("sys.argv", ["piptool", "d", "numpy"]), patch.object(px, "run") as mock_run:
-            piptool.main()
-            assert mock_run.called
-
-    def test_main_upgrade_command(self) -> None:
-        """main() should handle upgrade command."""
-        with patch("sys.argv", ["piptool", "up"]), patch.object(px, "run") as mock_run:
-            piptool.main()
-            assert mock_run.called
-
-    def test_main_freeze_command(self) -> None:
-        """main() should handle freeze command."""
-        with patch("sys.argv", ["piptool", "f"]), patch.object(px, "run") as mock_run:
-            piptool.main()
-            assert mock_run.called
-
-    def test_main_with_no_args_shows_help(self) -> None:
-        """main() with no args should show help."""
-        with patch("sys.argv", ["piptool"]):
-            piptool.main()
-            # Should print help and return