Add CITATION.cff and LICENSE for Zenodo DOI minting

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: djdarmor

CITATION.cff

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+cff-version: 1.2.0
+message: "If you use these proofs, please cite as below."
+title: "AFLD Proof: Machine-Verified Properties of Dimensional Folding"
+type: software
+authors:
+  - family-names: Kilpatrick
+    given-names: Christopher
+    alias: djdarmor
+repository-code: "https://github.com/djdarmor/afld-proof"
+license: MIT
+version: "1.0.0"
+date-released: "2026-02-19"
+keywords:
+  - lean4
+  - formal verification
+  - theorem proving
+  - dimensional folding
+  - compression
+  - number theory
+  - fermat bridge
+  - mathlib
+abstract: >-
+  Machine-verified formal proofs in Lean 4 (with Mathlib) for the
+  mathematical foundations of lossless dimensional folding. 91 theorems
+  with zero sorry and zero axioms, covering: Fermat bridge bijectivity,
+  Cyclic Preservation Theorem, 85% signed-data ceiling, rank-nullity
+  information loss, P≠NP dimensional separation, Beal Conjecture
+  infrastructure, and full compression pipeline error bounds.

LICENSE

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+MIT License
+
+Copyright (c) 2026 Christopher Kilpatrick
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.