message: Add core ActiveEffect flags to FlagConfig
  Adds the flag used to tell if an ActiveEffect is considered a status
  effect, which controls if the effect is shown as an icon on the token.
  Adds the flag used to tell if an ActiveEffect is considered an overlay
  effect, which displays over the token image.
diff: @@ -122,8 +122,14 @@ declare global {
  // eslint-disable-next-line @typescript-eslint/no-empty-interface
  interface SourceConfig {}
  - // eslint-disable-next-line @typescript-eslint/no-empty-interface
  - interface FlagConfig {}
  + interface FlagConfig {
  + ActiveEffect: {
  + core?: {
  + statusId?: string;
  + overlay?: boolean;
  + };
  + };
  + }
  // eslint-disable-next-line @typescript-eslint/no-empty-interface
  interface WebRTCConfig {}
  