Function prepareAppIcon

prepareAppIcon(
    buildDir: string,
    appIcon: string,
    platforms: string[],
): Promise<void>
copy a png file into the build dir and use it as launcher icon
Parameters
- buildDir: string
- appIcon: string
  path to appIcon file
- platforms: string[]
Returns Promise<void>
- Defined in utils/common-build-utils.ts:447