UMDP3 Checker

@r-sharp đang làm issue này rồi.

Từ ngày 31/7/2026.

## Issues

- [x] #214 => #226

- [x] Clarify output in verbose-mode => #234

`1 : UPPERCASE variable name at line(s): 40, 43, 48, 49, 50` instead of
`1 : UPPERCASE variable name : [40, 43, 48, 49, 50]`

- [x] Scan only what needs to be scanned instead of all files when `--file-type` flag is present

```
umdp3_conformance.py --path --file-type Fortran --fullcheck
```

- [ ] #221