docs: weekly changelog update

Author: yash-pouranik

mintlify/docs/changelog/july-2026.mdx

@@ -0,0 +1,16 @@
+---
+title: Changelog
+description: What's new in urBackend — new features, improvements, and fixes.
+---
+
+<Update label="2026-07-06" description="Week of 2026-06-29–2026-07-06" tags={["Feature", "Improvement"]}>
+## New features
+
+**CLI Commands** — Three new CLI commands have been added to enhance user experience.
+**Rate Limiter** — A rate limiter has been added to the bullMQ worker to prevent abuse.
+
+## Improvements
+
+**Dashboard Redesign** — The dashboard has been redesigned with a persistent left sidebar and is now compatible with light mode.
+</Update>
+