Add pythainlp.braille module with core functionality and tests

Co-authored-by: wannaphong <8536487+wannaphong@users.noreply.github.com>

Author: Copilot

pythainlp/braille/__init__.py

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: 2016-2026 PyThaiNLP Project
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: Apache-2.0
+"""Thai braille processing."""
+
+__all__: list[str] = [
+    "thai_text_braille",
+    "thai_word_braille",
+]
+
+from pythainlp.braille.core import thai_text_braille, thai_word_braille