feat: add API JSON generator (#5677)

Co-authored-by: Liam <30486941+liamHowatt@users.noreply.github.com>

tests/gen_json/test_gen_json.py

@@ -0,0 +1,41 @@
+# Basic test to see if the API jeson generator is able to run without any errors
+# This test doesn't not check to make sure the output is correct. It is for the
+# sole purpose of making sure it completes.
+
+import os
+import sys
+
+BASE_PATH = os.path.abspath(os.path.dirname(__file__))
+SCRIPT_PATH = os.path.join(
+    BASE_PATH, '..', '..', 'scripts',
+    'gen_json', 'gen_json.py'
+)
+
+OUTPUT_FILE = os.path.join(BASE_PATH, 'lvgl.json')
+
+cmd = f'{sys.executable} "{SCRIPT_PATH}" --output-path "{BASE_PATH}"'
+print('running test')
+print(cmd)
+
+result = os.system(cmd)
+if result != 0:
+    print()
+    sys.stderr.write('TEST FAILED!!\n\n')
+    sys.stderr.flush()
+    sys.exit(result)
+
+
+if not os.path.exists(OUTPUT_FILE):
+    print()
+    sys.stderr.write(f'"{OUTPUT_FILE}" was not found.\n')
+    sys.stderr.write('TEST FAILED!!\n\n')
+    sys.stderr.flush()
+    sys.exit(-500)
+
+try:
+    os.remove(OUTPUT_FILE)
+except:  # NOQA
+    pass
+
+print()
+print('TEST PASSED!')