feat: complete placement analysis workflow

src/lib/engine/index.ts

@@ -0,0 +1,11 @@
+export * from './card-adapter.ts';
+export * from './board-effects.ts';
+export * from './exact-optimizer.ts';
+export * from './memory.ts';
+export * from './maximum-weight-matching.ts';
+export * from './optimizer.ts';
+export * from './score.ts';
+export * from './skill-condition.ts';
+export * from './timeline.ts';
+export * from './types.ts';
+export * from './unit-power.ts';