added CLA

Author: d2phap

CLA.md

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+# ImageGlass Contributor License Agreement (CLA)
+By submitting a contribution to the ImageGlass project, you agree to the following terms:
+
+
+## 1. Grant of Rights
+You grant the project maintainer a **perpetual, worldwide, non-exclusive, royalty-free, irrevocable license** to use, reproduce, modify, distribute, and sublicense your contributions as part of the project.
+
+
+## 2. Patent Grant
+You grant a **perpetual, worldwide, non-exclusive, royalty-free, irrevocable license** for any patent claims necessarily infringed by your contribution.
+
+
+## 3. Your Representations
+You confirm that:
+- The contribution is your **original work**, or you have the right to submit it
+- You have obtained **permission from your employer**, if required
+- You are legally able to grant these rights
+
+
+## 4. Third-Party Content
+If your contribution includes third-party material, you must:
+- Retain all original licenses and notices
+- Clearly disclose such material in your contribution
+
+
+## 5. No Warranty
+Your contributions are provided **“AS IS”**, without warranties of any kind, including but not limited to non-infringement, merchantability, or fitness for a particular purpose.
+
+
+## 6. Public Record
+You agree that your contributions and associated information (such as your name and GitHub username) may be publicly visible and stored indefinitely.
+
+
+## 7. Acceptance
+By submitting a pull request, commit, issue, or any contribution, you agree to this CLA.
+