Add core engine: tarot + astrology reading generator with CLI and i18n

Plain-C, dependency-free engine that produces a personalized daily Celtic Cross tarot spread and natal-chart/transit astrology reading, plus a standalone CLI (dist/deck-engine) and run.sh wrapper. Includes English/German output via a simple key=value translation format, and docs/diagrams describing the architecture and I/O.
2026-07-04 06:49:18 +02:00
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+MIT License
+
+Copyright (c) 2019-2025 Don Cross <cosinekitty@gmail.com>
+
+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.
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+Vendored from https://github.com/cosinekitty/astronomy
+
+- Files: `source/c/astronomy.h`, `source/c/astronomy.c`
+- Pinned commit: `865d3da7d8112bbc7911238052c6af4aaf877181` (master, 2025-01-27)
+- License: MIT (see `LICENSE` in this directory)
+- Unmodified from upstream.