Add README

Author: Matus Misiak

README.md

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+# Classic Watchface
+
+![Preview](assets/l66/images/icon.svg)
+
+I really liked the default watchface on Xiaomi Smart Band 7, but I missed the digital clock.
+
+## Features
+
+- Editable
+- Jump to the app by clicking on corresponding widget
+
+## Documentation
+
+I found useful the official [Zepp OS Dev documentation](https://docs.zepp.com/).
+
+## Creits
+
+Used font: [Rubik](https://github.com/googlefonts/rubik)
+
+## Notes
+
+- Date is currently only in DD/MM format
+- Jump on PAI doesn't work