docs: add privacy policy

docs/privacy-policy.md

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+# Privacy Policy
+
+## Information Collection
+
+To enhance your experience, we collect service usage data, such as service activations and data logging occurrences. Please note that this data does not include any of your private information.
+
+We may utilize third-party services to gather this information. You can learn more about these third-party service providers' privacy policies by visiting the following links:
+
+- [Posthog Privacy Policy](https://posthog.com/privacy)
+
+## Purpose of Information
+
+We primarily collect information for the following purposes:
+
+- Providing the products and services you request.
+- Continuously improving our products and services.
+
+Additionally, we collect data on specific functionalities such as shortcut usage and collection creation to help us assess and schedule product updates.
+
+## Contact Us
+
+If you have any questions or suggestions concerning this Privacy Policy, please don't hesitate to reach out to us at `yourselfhosted@gmail.com`.