/** Injects needle asap script into the index.html for when the main needle engine bundle is still being downloaded.
 * @param {"build" | "serve"} command
 * @param {import('../types/needleConfig').needleMeta | null | undefined} config
 * @param {import('../types').userSettings} userSettings
 * @returns {Promise<import('vite').Plugin[] | null>}
 */
export function needleAsap(command: "build" | "serve", config: import("../types/needleConfig").needleMeta | null | undefined, userSettings: import("../types").userSettings): Promise<import("vite").Plugin[] | null>;