Consider using Apache Tika instead of Plexus for encoding detection

### New feature, improvement proposal

```
static String detectEncoding(File file) throws IOException {
Tika tika = new Tika();
// Tika's detect method checks for explicit declarations (like XML)
// and BOMs, then falls back to robust statistical analysis.
String detectedEncoding = tika.detect(file.toPath());

// Tika's detect() returns a MIME type like "text/plain; charset=UTF-8" or just "UTF-8".
if (detectedEncoding.contains("charset=")) {
return detectedEncoding.substring(detectedEncoding.indexOf("charset=") + 8);
}
return detectedEncoding;
}
```

The issue proposes replacing Plexus encoding detection with Apache Tika but names no file or test. Locate the current Plexus detection entry point and dependency configuration, then compare Tika's returned values with the plugin's expected encoding value. Done means the replacement's behavior and compatibility are verified.

Written by the indexing model from the issue text.