feat: add Claude Fable 5.1 to Claude computer use models (#121)

* feat: add Claude Fable 5.1 to Claude computer use, Browser Use and HyperAgent models

* Limit Claude Fable 5.1 to Claude computer use

* don't change version

---------

Co-authored-by: Nikhil Shahi <nshahi1998@gmail.com>

Author: shrisukhani

hyperbrowser/models/consts.py

@@ -68,6 +68,7 @@
     "gemini-3-flash-preview",
 ]
 ClaudeComputerUseLlm = Literal[
+    "claude-fable-5-1",
     "claude-opus-5",
     "claude-opus-4-5",
     "claude-opus-4-6",