JSSpecCompiler: Add our first test :^)

Author: https://github.com/DanShaders
Commit: 00928764e9
Pull-request: https://github.com/SerenityOS/serenity/pull/21612
Reviewed-by: https://github.com/ADKaster

Meta/check-style.py

@@ -23,6 +23,7 @@ GOOD_LICENSE_HEADER_PATTERN = re.compile(
 LICENSE_HEADER_CHECK_EXCLUDES = {
     'AK/Checked.h',
     'AK/Function.h',
+    'Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Tests/',
     'Userland/Libraries/LibJS/SafeFunction.h',
     'Userland/Libraries/LibELF/ELFABI.h',
     'Userland/Libraries/LibCodeComprehension/Cpp/Tests/',