feat: add zero-arg IO.print overload and remove newline skipping in parameter parsing

Add a static `print` method with no arguments that writes only a newline, enabling blank-line output. Remove the `ignoreNewlines` calls before closing parentheses in parameter lists and method calls, tightening syntax rules. Add a `strlen` TODO comment in symbol table lookup for future optimization. Move the `Foo.toString` test from `test/io/write.wren` to `test/io/print.wren` and delete the old write test file.

src/wren_compiler.c

@@ -1405,8 +1405,6 @@ static int parameterList(Compiler* compiler, char* name, int* length,
   }
   while (match(compiler, TOKEN_COMMA));
 
-  // Allow a newline before the closing ')'.
-  ignoreNewlines(compiler);
   const char* message = (endToken == TOKEN_RIGHT_PAREN) ?
       "Expect ')' after parameters." : "Expect '|' after parameters.";
   consume(compiler, endToken, message);
@@ -1443,8 +1441,6 @@ static void methodCall(Compiler* compiler, Code instruction,
     }
     while (match(compiler, TOKEN_COMMA));
 
-    // Allow a newline before the closing ')'.
-    ignoreNewlines(compiler);
     consume(compiler, TOKEN_RIGHT_PAREN, "Expect ')' after arguments.");
   }
 

src/wren_io.c

@@ -8,6 +8,10 @@
 // This string literal is generated automatically from io.wren. Do not edit.
 static const char* libSource =
 "class IO {\n"
+"  static print {\n"
+"    IO.writeString_(\"\n\")\n"
+"  }\n"
+"\n"
 "  static print(obj) {\n"
 "    IO.writeString_(obj.toString)\n"
 "    IO.writeString_(\"\n\")\n"

src/wren_utils.c

@@ -59,6 +59,7 @@ int wrenSymbolTableFind(SymbolTable* symbols, const char* name, size_t length)
   // TODO: O(n). Do something better.
   for (int i = 0; i < symbols->count; i++)
   {
+    // TODO: strlen() here is gross. Symbol table should store lengths.
     if (strlen(symbols->data[i]) == length &&
         strncmp(symbols->data[i], name, length) == 0) return i;
   }