lua: coroutine.running/isyieldable

lib/lua/runtime.sx

@@ -694,6 +694,8 @@
 (dict-set! coroutine "yield" lua-coroutine-yield)
 (dict-set! coroutine "status" lua-coroutine-status)
 (dict-set! coroutine "wrap" lua-coroutine-wrap)
+(dict-set! coroutine "running" (fn () __current-co))
+(dict-set! coroutine "isyieldable" (fn () (not (= __current-co nil))))
 
 ;; ── string library ────────────────────────────────────────────