feat: add asset import services

src/types/effects.ts

@@ -0,0 +1,19 @@
+export interface EffectMapEntry {
+  id: string
+  lib: string
+  type: string // 'fx' | 'dance'
+  revision: number
+}
+
+export interface EffectListItem extends EffectMapEntry {
+  present: boolean
+  nitroExists: boolean
+}
+
+export interface ImportEffectResult {
+  ok: boolean
+  lib: string
+  warnings: string[]
+  error?: string
+}
+