Initial public source release

Split reusable rendering and format support into vectorail-core and vectorail-gc.

.gitignore

@@ -0,0 +1,61 @@
+# User-provided game data and decoded assets
+/GC/
+/dds_png/
+
+# Build and release output
+/build/
+/build-*/
+/dist/
+CMakeFiles/
+CMakeCache.txt
+cmake_install.cmake
+compile_commands.json
+Makefile
+*.o
+*.obj
+*.a
+*.lib
+*.so
+*.dylib
+*.dll
+*.exe
+*.pdb
+*.ilk
+*.dSYM/
+
+# PSPDEV output and optional private XMB media
+/psp/EBOOT.PBP
+/psp/PARAM.SFO
+/psp/*.elf
+/psp/*.prx
+/psp/assets/*.PNG
+/psp/assets/*.AT3
+!/psp/assets/README.md
+
+# Local reverse-engineering environments and scratch data
+/.agents/
+/.codex/
+/.cache/
+/.ghidra_projects/
+/ghidra_projects/
+/.proton-gc/
+/.wine-gc/
+/.venv-re/
+/.env
+/tools/__pycache__/
+*.pyc
+
+# External checkouts are separate repositories
+/third_party/
+
+# Local/generated experiments
+/a.svg
+/Makefile.in
+/iDmacDrv32.spec
+/iDmacDrv32_main.c
+
+# Editor and OS files
+.DS_Store
+.idea/
+.vscode/
+*~