add changelog

.github/workflows/changelog.yml

@@ -0,0 +1,14 @@
+name: Check Changelog
+on:
+  pull_request:
+    types: [ assigned, opened, synchronize, reopened, labeled, unlabeled ]
+    branches:
+      - main
+jobs:
+  Check-Changelog:
+    name: Check Changelog Action
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: tarides/changelog-check-action@v2
+        with:
+          changelog: CHANGELOG.MD

CHANGELOG.MD

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+# egui Double Slider Widget changelog
+
+All notable changes to the `egui double slider` crate will be documented in this file.
+
+# Unreleased 0.3.0
+
+### Added:
+
+* ...
+
+## 0.3.0 - 1.11.2024 - Scrolling and zooming implemented
+
+### Added:
+
+* Scrolling and zooming gesture with configurable factors in the builder
+
+