Add sync versions of stream and save methods (#215)

* Add sync versions of stream and save methods

In order to provide synchronous interface to the library

* Fix save_sync() failing to use metadata_fname and fix typing issues

Signed-off-by: rany <ranygh@riseup.net>

---------

Signed-off-by: rany <ranygh@riseup.net>
Co-authored-by: rany <ranygh@riseup.net>

examples/sync_audio_stream_in_async_context.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+"""
+This example shows the sync version of stream function which also
+works when run from a sync function called itself from an async function.
+"""
+
+import asyncio
+
+import edge_tts
+
+TEXT = "Hello World!"
+VOICE = "en-GB-SoniaNeural"
+OUTPUT_FILE = "test.mp3"
+
+
+def main() -> None:
+    """Main function to process audio and metadata synchronously."""
+    communicate = edge_tts.Communicate(TEXT, VOICE)
+    with open(OUTPUT_FILE, "wb") as file:
+        for chunk in communicate.stream_sync():
+            if chunk["type"] == "audio":
+                file.write(chunk["data"])
+            elif chunk["type"] == "WordBoundary":
+                print(f"WordBoundary: {chunk}")
+
+
+async def amain() -> None:
+    """ "
+    Async main function to call sync main function
+
+    This demonstrates that this works even when called from an async function.
+    """
+    main()
+
+
+if __name__ == "__main__":
+    loop = asyncio.get_event_loop_policy().get_event_loop()
+    try:
+        loop.run_until_complete(amain())
+    finally:
+        loop.close()