Update README to include mention of logging

This is one of the features missing from the original library.
Seems to be a feature desired by the community according to:
serenadeai/java-tree-sitter#28.
Therefore, it makes sense to advertise this in the README.

src/main/doc/README.md

@@ -9,6 +9,7 @@ while introducing support for those that were completely absent from the origina
 Highlights include:
 
 - Incremental abstract syntax tree edits
+- Parser and lexer debugging through loggers
 - APIs for querying parsed abstract syntax trees
 - Support for both macOS and Linux out of the box
 - A wide range of languages [supported](.gitmodules) out of the box
@@ -205,5 +206,27 @@ public class Example {
 }
 ```
 
+If you would like to debug the parsing process, you can attach loggers directly to a `Parser`:
+
+```java
+import ch.usi.si.seart.treesitter.*;
+import org.slf4j.*;
+
+public class Example {
+
+    // init omitted...
+
+    public static void main(String[] args) {
+        Logger logger = LoggerFactory.getLogger(Example.class);
+        try (Parser parser = Parser.getFor(Language.PYTHON)) {
+            parser.setLogger(logger);
+            parser.parse("pass").close();
+        } catch (Exception ex) {
+            // ...
+        }
+    }
+}
+```
+
 For more usage examples, take a look at the [tests](src/test/java/ch/usi/si/seart/treesitter).
 You can also refer to the full documentation [here](https://javadoc.io/doc/ch.usi.si.seart/java-tree-sitter/latest/index.html).