chore: Add License file

Author: SebastianZug

LICENSE

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+CC0 1.0 Universal
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
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+1. Copyright and Related Rights. A Work made available under CC0 may be
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+i. the right to reproduce, adapt, distribute, perform, display, communicate,
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+including without limitation commercial, advertising or promotional purposes (the
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+4. Limitations and Disclaimers.
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