Add changelog

CHANGELOG.md

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+# PYNQ Composable Overlays ChangeLog
+
+## 1.0.0
+
+### Added
+
+- Update package name to `pynq_composable`
+- Composable logic must be inside a hierarchy, to leverage pynq `DefaultHierarchy` API
+- Cache dictionaries to speedup run time, up to 50x
+- Allow for offline automatic hardware discovery, caching dict
+- Created `VideoStream` metaClass to handle all combination of video sources and sinks
+- Video resolution is stored in `/tmp/resolution.json` to automatically configure video IP
+- Support for pure stream IP
+- Python code improvements
+- Support for Kria KV260 Vision Started Kit
+- Support for the PYNQ-Z1 with the same overlay as PYNQ-Z2
+- Default paths concept
+- Initial pytest support and code linting in a workflow
+- Read The Docs documentation
+- Contributing guidelines
+- Support for python `3.8` and `3.9`
+
+### Removed
+
+- Deprecated `_debug_switch` method. Use the AXI4-Stream Switch driver
+- Deprecated support for python `3.6` and `3.7`