v0.10.0 — Linux support verified

Changed

• Linux is now a supported target — make builds raylib.so and the full headless test suite (248 checks) passes on Linux. Dropped the stale "work in progress" language from the README and added the Linux dependency install steps.
• GetTargetFPS documented as an API-symmetry alias that delegates to GetFPS() (raylib has no such function).

Notes

• GPU/audio-dependent bindings (rendering, hardware textures, audio playback, input) still require a window or audio device and are verified via example scripts, not the headless suite.
• Ships vendored raylib 6.0 + Lua 5.5.0 static libs; 606 callables via require("raylib").

Assets

• raylib-linux-x86_64.so — prebuilt Linux module (Lua 5.5). Put it on Lua's package.cpath as raylib.so.