chore(typing): snapshot local pinyin WIP before syncing cloud branch

Preserve the in-progress local typing/pinyin implementation so feat/pinyin
can safely reset to origin/feat/pinyin (cloud English + Chinese typing).

NOTICE-TYPING.md

@@ -0,0 +1,42 @@
+# Third-party notices — Typing keyboard
+
+The generated source manifest is
+`OSGKeyboardShared/Resources/Typing/Rime/manifest.json`. Exact librime
+binary dependency licenses are bundled beside `NOTICE.txt`.
+
+## Distributed components
+
+| Component | Pinned version / commit | License | Purpose |
+|-----------|-------------------------|---------|---------|
+| [librime-xcframework](https://github.com/ghostflyby/librime-xcframework) | `1.17.0-pack.1`, package `d578192…` | BSD-3-Clause + bundled dependency notices | Static iOS librime runtime |
+| [rime/librime](https://github.com/rime/librime) | `1.17.0` | BSD-3-Clause | Input-method engine |
+| [rime-pinyin-simp](https://github.com/rime/rime-pinyin-simp) | `0c6861e…` | Apache-2.0 | Permissive baseline dictionary |
+| [fxsjy/jieba](https://github.com/fxsjy/jieba) | `67fa2e3…` | MIT | Modern Simplified-Chinese word frequencies |
+| [phrase-pinyin-data](https://github.com/mozillazg/phrase-pinyin-data) | `cee0ed6…` | MIT | Phrase pronunciations |
+| [pinyin-data](https://github.com/mozillazg/pinyin-data) | `923b108…` | MIT | Character-pronunciation fallback |
+
+`Scripts/typing/build_rime_dictionary.py` deterministically merges these
+sources into `osg_pinyin.dict.yaml`; its manifest records every source URL,
+commit, SHA-256 and output SHA-256.
+
+## OSG-owned pieces
+
+- SwiftUI QWERTY / candidate UI and `RimeEngineBridging`.
+- Objective-C++ C-API bridge.
+- Full-pinyin, Microsoft-double-pinyin and Sogou-double-pinyin schemas.
+- Microsoft/Sogou mappings were independently encoded from public key-map
+  specifications; GPL schema files were not copied.
+- Eight opt-in fuzzy-pinyin rule groups.
+
+## Reference only
+
+NanoMouse commit `a6177d898a01662ce551b43a01cf82a9f84ca54c`
+(MIT) was used to understand iOS Rime lifecycle boundaries. Its KeyboardKit,
+UI, data packages and application features are not linked into OSGKeyboard.
+
+## Explicitly excluded
+
+- rime-ice / 雾凇拼音 — GPL-3.0
+- rime-double-pinyin schemas — GPL-3.0
+- rime-luna-pinyin and rime-essay — LGPL-3.0
+- KeyboardKit Pro — proprietary