chore: update project version to 4.7.0 and revise description for clarity

Author: RockChinQ

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "langbot"
-version = "4.6.5"
-description = "Easy-to-use global IM bot platform designed for LLM era"
+version = "4.7.0"
+description = "Production-grade platform for building IM bots"
 readme = "README.md"
 license-files = ["LICENSE"]
 requires-python = ">=3.11,<4.0"

src/langbot/__init__.py

@@ -1,3 +1,3 @@
-"""LangBot - Easy-to-use global IM bot platform designed for LLM era"""
+"""LangBot - Production-grade platform for building IM bots"""
 
-__version__ = '4.6.5'
+__version__ = '4.7.0'