Add ZamAI ownership and website attribution

Preserve existing license terms while identifying ZamAI, maintainer tasal9, and https://zamai.dev.

LICENSE

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+ZAMAI DATASET ATTRIBUTION NOTICE
+
+Copyright (c) 2026 ZamAI
+Organization: ZamAI
+Maintainer and Hugging Face account: tasal9
+Official website: https://zamai.dev
+Dataset repository: https://huggingface.co/datasets/tasal9/ZamAI-Pashto-Dataset-Cleaned
+
+Declared dataset license: apache-2.0
+Canonical license terms: https://www.apache.org/licenses/LICENSE-2.0
+
+This notice identifies the dataset steward and official project website. It does not replace,
+restrict, expand, or otherwise modify the applicable license terms stated by this repository.
+
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