chore(theme): astro 锁定 ~5.18.0（终审 Minor）+ docs: Plan 4 收官

Co-Authored-By: Claude Code <noreply@anthropic.com>

.deps_siteforge_v812/bs4/exceptions.py

@@ -0,0 +1,28 @@
+"""Exceptions defined by Beautiful Soup itself."""
+
+from typing import Union
+
+
+class StopParsing(Exception):
+    """Exception raised by a TreeBuilder if it's unable to continue parsing."""
+
+
+class FeatureNotFound(ValueError):
+    """Exception raised by the BeautifulSoup constructor if no parser with the
+    requested features is found.
+    """
+
+
+class ParserRejectedMarkup(Exception):
+    """An Exception to be raised when the underlying parser simply
+    refuses to parse the given markup.
+    """
+
+    def __init__(self, message_or_exception: Union[str, Exception]):
+        """Explain why the parser rejected the given markup, either
+        with a textual explanation or another exception.
+        """
+        if isinstance(message_or_exception, Exception):
+            e = message_or_exception
+            message_or_exception = "%s: %s" % (e.__class__.__name__, str(e))
+        super(ParserRejectedMarkup, self).__init__(message_or_exception)