Replace print/println keywords with generic function call mechanism

- Add NODE_CALL with name, args, and arg_count to parser
- Add TOK_COMMA token and tokenize (, ), , in lexer
- Remove TOK_PRINT/TOK_PRINTLN keywords; print/println are now regular
  identifiers resolved as built-in functions in the evaluator
- Add NODE_CALL debug output in ast_print

src/vm/eval.h

@@ -83,7 +83,8 @@ size_t eval(ASTNode *node, Environment *env, void *allocator, int debug,
                l->data.string_val.length);
 
         // Copy right text
-        memcpy(tempBuff + l->data.string_val.length, JLANG_RESOLVE(allocator, r->data.string_val.chars),
+        memcpy(tempBuff + l->data.string_val.length,
+               JLANG_RESOLVE(allocator, r->data.string_val.chars),
                r->data.string_val.length);
         tempBuff[n] = '\0';
 
@@ -145,6 +146,31 @@ size_t eval(ASTNode *node, Environment *env, void *allocator, int debug,
     }
     break;
   }
+  case NODE_CALL: {
+    if (strcmp(node->data.call.name, "print") == 0) {
+      if (node->data.call.arg_count > 0) {
+        size_t val = eval(node->data.call.args[0], env, allocator, debug, gc);
+        obj_print(allocator, val, "");
+        return val;
+      }
+      
+      printf("");
+      return 0;
+    }
+    if (strcmp(node->data.call.name, "println") == 0) {
+      if (node->data.call.arg_count > 0) {
+        size_t val = eval(node->data.call.args[0], env, allocator, debug, gc);
+        obj_print(allocator, val, "");
+        printf("\n");
+        return val;
+      }
+
+      printf("\n");
+      return 0;
+    }
+    printf("ERROR: funcion '%s' no definida\n", node->data.call.name);
+    exit(1);
+  }
   default:
     break;
   }