fix: type-only import of IPXRuntimeConfig

Author: danielroe

src/types/module.ts

@@ -1,6 +1,6 @@
 import type { Nuxt } from '@nuxt/schema'
 import type { ModuleOptions } from '../module'
-import { IPXRuntimeConfig } from '../ipx'
+import type { IPXRuntimeConfig } from '../ipx'
 import type { ImageModifiers } from './image'
 
 // eslint-disable-next-line no-use-before-define