chore: add changeset for v3.31.0

Author: mrubens

.changeset/v3.31.0.md

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+---
+"roo-cline": minor
+---
+
+![3.31.0 Release - Todo List and Task Header Improvements](/releases/3.31.0-release.png)
+
+- Improvements to to-do lists and task headers (thanks @brunobergher!)
+- Fix: Prevent crash when streaming chunks have null choices array (thanks @daniel-lxs!)
+- Fix: Prevent context condensing on settings save when provider/model unchanged (#4430 by @hannesrudolph, PR by @daniel-lxs)
+- Fix: Respect custom OpenRouter URL for all API operations (#8947 by @sstraus, PR by @roomote)
+- Add comprehensive error logging to Roo Cloud provider (thanks @daniel-lxs!)
+- UX: Less caffeinated kangaroo (thanks @brunobergher!)