출력 파일명을 {분석폴더명}_DependencyMetrix 로 변경

- dependency_matrix.html/csv → <폴더명>_DependencyMetrix.html/csv
  (예: D:\ZOO → ZOO_DependencyMetrix.html)
- 파일명 불가 문자는 '_' 로 치환
- build-single-exe.bat: exe 회수 경로를 exe/ 폴더로 수정
- README 갱신

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/DsmTool/build-single-exe.bat

@@ -40,6 +40,7 @@ popd
 if not "%ERR%"=="0" ( echo [ERROR] publish failed %ERR% & exit /b %ERR% )
 
 echo [4/4] copy exe back
-copy /y "%WORK%\bin\x64\Release\net9.0\win-x64\publish\DsmTool.exe" "%PROJ%..\DsmTool.exe" >nul
-echo DONE: "%PROJ%..\DsmTool.exe"
+if not exist "%PROJ%..\..\exe" mkdir "%PROJ%..\..\exe"
+copy /y "%WORK%\bin\x64\Release\net9.0\win-x64\publish\DsmTool.exe" "%PROJ%..\..\exe\DsmTool.exe" >nul
+echo DONE: "%PROJ%..\..\exe\DsmTool.exe"
 endlocal