Add Bot API parser and code-generator

generator/cli.py

@@ -0,0 +1,22 @@
+import logging
+import pathlib
+import sys
+import typing
+
+from generator.generator import Generator
+from generator.parser import Parser
+
+script_path = pathlib.Path(__file__).parent
+out_dir = script_path.parent / "aiogram" / "_telegram"
+
+
+def main(argv: typing.List[str]) -> int:
+    logging.basicConfig(level=logging.ERROR, stream=sys.stdout)
+    parser = Parser()
+    parser.parse()
+    generator = Generator(parser)
+
+    with (out_dir / "types.py").open("w") as f:
+        f.write(generator.render_types())
+
+    return 0