chore(build): setup gradle and antlr for v2

app/src/main/java/iut_rodez/lir_lang/App.java

@@ -0,0 +1,26 @@
+/*
+ * App.java
+ */
+package iut_rodez.lir_lang;
+
+import iut_rodez.lir_lang.core.LirLexer;
+import iut_rodez.lir_lang.core.LirParser;
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.CommonTokenStream;
+import org.antlr.v4.runtime.tree.ParseTree;
+
+/** Main application class for LIR language processing. */
+public class App {
+
+  /**
+   * Main method to run the LIR parser.
+   *
+   * @param args Command line arguments (not used).
+   */
+  public static void main(String[] args) {
+    LirLexer lexer = new LirLexer(CharStreams.fromString("10"));
+    LirParser parser = new LirParser(new CommonTokenStream(lexer));
+    ParseTree tree = parser.prog();
+    System.out.println(tree.toStringTree(parser));
+  }
+}