Move BitGrid from task::bit_grid to display::bitgrid as its canonical
home. Delete the old module. Rename fields to match known semantics:
_unused_04 → external_buffer, _unused_1c/20 → clip_left/clip_top,
width_dup/height_dup → clip_right/clip_bottom.
Convert bit_grid_init to BitGrid::init with *mut BitGrid parameter.
Replace magic vtable address with va::BIT_GRID_VTABLE constant.
Remove redundant double memset. Remove dead TaskStateMachine class.
Rename DDGame::display_gfx → display_bitgrid (it's a BitGrid, not
DisplayGfx). Rename Sprite::display_gfx → bitgrid_vtable. Clean up
tsm variable names and stale re-exports throughout.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
refactor: rename openwa-wormkit crate to openwa-dll, output openwa.dll
The project hasn't been a WormKit DLL for a long time — it requires a
custom launcher. Rename the crate to openwa-dll with output openwa.dll
to match the rest of the naming convention (openwa-core, openwa-launcher).
Updates all references across Cargo.toml, Rust sources, PowerShell scripts,
CLAUDE.md, skill files, and docs. Replaces stale "wormkit hook/shim"
comments with accurate descriptions. Three remaining "WormKit" references
are legitimate (refer to the actual WA modding framework).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
refactor: extract game logic from wormkit/replacements to openwa-core
