Publish Chimera GFX source

cmake/README.md

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+# CMake helpers
+
+Project-owned CMake modules are placed here as they become necessary. Phase 0
+keeps policy in the top-level build so the enabled target graph is easy to
+audit.
+
+The Phase-1 VideoOut option imports an already verified static SDL build by
+absolute path. It never downloads, patches, or executes a dependency during
+CMake configuration; orchestration and pin checks live in
+`tools/build-phase1-videoout.sh`.
+
+The installed config exports the core as `chimera-gfx::chimera-gfx` and the
+capability-honest interfaces as
+`chimera-gfx::chimera-gfx-retroarch-scaffold` and
+`chimera-gfx::chimera-gfx-sdl2-scaffold`.

cmake/chimera-gfx-config.cmake.in

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+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/chimera-gfx-targets.cmake")