Support filter by file with file pattern and literal configuration

### Background

GitProxy currently supports commit message, commit diff and commit e-mail domain scanning. A common use case that is not supported is file name filtering and scanning.

### Vision 🪄

```json
"message": {
"block": {
"literals": ["xlsx", "csv"],
"patterns": [".*.txt"]
}
},
```
```[tasklist]
### Tasks
```