Document third-party licensing and provenance

PROJECT_IDENTITY.md

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+# WeirdUtils project identity
+
+## Current maintained GitHub repository
+
+The current GitHub repository maintained and packaged by Dusk-92 is:
+
+- https://github.com/Dusk-92/WeirdUtils
+
+The source history in this repository substantially predates the GitHub
+packaging work and contains development by MarcelineVQ. The historical/source
+project referenced by the repository is:
+
+- https://codeberg.org/MarcelineVQ/WeirdUtils
+
+A mirror, release package, or compatibility target does not imply that its
+maintainer authored every component present in the tree.
+
+## Independent community project
+
+WeirdUtils is an independent community project for the World of Warcraft
+1.12.1 client.
+
+It is not affiliated with, sponsored by, approved by, or endorsed by Blizzard
+Entertainment, Turtle WoW, OctoWoW, SuperWoW, DPSMate, MikScrollingBattleText,
+VanillaFixes, UnitXP_SP3, libdeflate, or any other referenced project unless
+explicitly stated by that party.
+
+Compatibility and reverse-engineering references do not imply endorsement,
+partnership, ownership, or official status.
+
+World of Warcraft, Warcraft, Blizzard Entertainment, and associated names,
+marks, artwork, client data, and game assets remain the property of their
+respective rights holders.
+
+## Maintainer boundary
+
+The imported Git history identifies MarcelineVQ as the principal author of the
+source project prior to the GitHub packaging work.
+
+Dusk-92's GitHub-specific commits after the imported source baseline primarily
+cover release automation/packaging and a small Zig 0.16 compatibility change.
+
+See `Docs/SOURCE_PROVENANCE.md` for the exact comparison.
+
+## Support boundary
+
+Dusk-92 is responsible only for the GitHub releases, packaging choices, and
+changes published from the maintained GitHub repository.
+
+Third-party authors and compatibility-target projects are not responsible for
+this packaging or for downstream modifications.