[FEAT] add more languages to `FileType`

## Description

Currently, only a handful of languages have been added to the `FileType`. A great list of languages with its according extension can be found [here](https://github.com/AlDanial/cloc#recognized-languages-)

## Technical Details

- [ ] add a new entry in the `FileType` enum
- [ ] add a check for the language in the `get_file_type` function

_Note: It's encouraged to add a maximum of 5 languages per PR_

Locate the FileType enum and the get_file_type function, then review the linked cloc recognized-languages list to choose up to five languages and their extensions. Done means each selected language has an enum entry and a corresponding check in get_file_type.

Scritto dal modello di indicizzazione a partire dal testo della issue.