/** Copy files on build from assets to dist.
 * @param {"build" | "serve"} command
 * @param {import('../types/needleConfig').needleMeta | null | undefined} config
 * @param {import('../types').userSettings} userSettings
 * @returns {import('vite').Plugin | null}
 */
export function needleCopyFiles(command: "build" | "serve", config: import("../types/needleConfig").needleMeta | null | undefined, userSettings: import("../types").userSettings): import("vite").Plugin | null;