add changelog with updates

Author: kovaca

CHANGELOG.md

@@ -0,0 +1,24 @@
+# Changelog
+
+## [0.0.1a2] - 2025-07-13
+
+### Added
+
+- Support for exporting colormaps to GEE. CSS-like array of strings (default) or GEE-flavored SLD color ramp XML (sld). 
+
+
+
+## [0.0.1a1] - 2025-07-06
+Alpha release of Palettize.
+
+### Added
+
+- Initialized basic project structure, core logic, basic plugin system, and CLI.  
+- Support for creating colormaps from preset palettes from `cmap` dependency.  
+- Support for exporting colormaps to various formats.
+  - GDAL gdaldem color-relief txt format
+  - QGIS color ramp XML
+  - SLD color ramp XML
+  - Titiler url encoded colormap string
+  - Mapgl color interpolation expression  
+  - Observable Plot color object