sourcemap service improvements

• If you disable sourcemaps with webpack then the cli will still translate any file if the sourcemap is present.
  the cli sourcemap service should be disable when env.sourcemap is false. I found myself in the need to see the actual source files from an error. I simply couldnt, had to modify the cli code to disable the sourcemap entirely
• when translating source maps the cli always adds "app" at the start as file name. This is wrong. It should only do that when it is an actual app file.

從 CLI sourcemap 服務著手，檢查 env.sourcemap 和已翻譯檔名的處理方式。在停用 sourcemap 以及處理非應用程式檔案時驗證行為；完成標準是：停用 sourcemap 時服務不會進行翻譯，且只有在適當的情況下才會加上 "app" 前綴。