Added changelogs

app/MindWork AI Studio/wwwroot/changelog/v0.2.0.md

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+# v0.2.0, build 90 (2024-05-04 10:50 UTC)
+- Improved layout
+- Added the chat page
+- Added simple content block handling
+- Added instance name validation to the settings
+- Added a confirmation dialog
+- Added clipboard handling
+- Added setting to save energy (slow chat streaming)
+- Added OpenAI provider
+- Finished provider & data model
+- Integration of MudBlazor.Markdown to render markdown content