v0.4.0 — Pre-boot launcher UI

New: RmlUi pre-boot launcher UI. Launch Sonic 2 through a graphical front-end
that verifies your ROM, lets you configure controllers (keyboard + gamepad,
rebindable, 2-player, 3/6-button), and adjust settings (widescreen, intro skip,
window scale, volume) before the game boots.

Built on the AGPL-free clean-room own backend (own VDP/bus/Z80 scheduler, ymfm FM,
superzazu Z80). Ships under PolyForm Noncommercial 1.0.0 + permissive third-party
notices.

Windows (win64): download the zip, unzip, and run SonicTheHedgehog2Recomp.exe.
Bring your own Sonic 2 ROM (sonic2.bin) — none is included. The launcher/ assets
folder must stay next to the exe.

Built from engine 5c165f6 (segagenesisrecomp v0.1.0).