feat: hot reload for config/templates and GitPython-based hot update with pre-update notification

pyproject.toml

@@ -9,6 +9,7 @@ authors = [
 requires-python = ">=3.12"
 dependencies = [
     "aiohttp>=3.14.3",
+    "gitpython>=3.1.62",
     "psutil>=7.2.2",
 ]
 
@@ -26,4 +27,4 @@ requires = ["setuptools>=75"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]
-py-modules = ["bot", "onebot", "monitor", "alerter", "templates"]
+py-modules = ["bot", "onebot", "monitor", "alerter", "templates", "updater"]