* polish: use “unknown” as a default filename in buildCodeFrameError * feat: add filename to transform error * fix: incorrect warning message * fix: add filename to generate phrase error message * address review comment from Nicolò
* polish: use “unknown” as a default filename in buildCodeFrameError * feat: add filename to transform error * fix: incorrect warning message * fix: add filename to generate phrase error message * address review comment from Nicolò