Fixes#554#1049
<!-- This is an auto-generated description by cubic. -->
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## Summary by cubic
Stop mutating package.json when reading files. readFileWithCache now
returns raw content so all fields are preserved (e.g., packageManager).
Fixes#554 and #1049.
- **Bug Fixes**
- Removed package.json "cleaning" logic and the cleanContent helper.
- Return and cache unmodified file content from both fs and
virtualFileSystem.
<!-- End of auto-generated description by cubic. -->
Test cases:
- [x] create-ts-errors
- [x] with auto-fix
- [x] without auto-fix
- [x] create-unfixable-ts-errors
- [x] manually edit file & click recheck
- [x] fix all
- [x] delete and rename case
THINGS
- [x] error handling for checkProblems isn't working as expected
- [x] make sure it works for both default templates (add tests)
- [x] fix bad animation
- [x] change file context (prompt/files)
IF everything passes in Windows AND defensive try catch... then enable
by default
- [x] enable auto-fix by default
