lua.wasm v0.1.0

Lua 5.4.8 for wasm32-wasi. Standardized wasm-EH encoding (try_table/exnref); runs on Node >= 24.15 (earlier 24.x needs --experimental-wasm-exnref), current browsers, and wasmtime. lua.wasm = standalone interpreter; lua-lib.wasm = embeddable reactor (luaw_* interface, see README). Built with zig c++ 0.15.1 (clang 20.1.2); witnesses re-run at cut time by this workflow. Evidence state: doc/wasm-audit-2026-07-05.md at this tag.