next.js

2c3cb02d - [dev-overlay] deprecate `devIndicators` options `appIsrStatus` and `buildActivity` (#76067)

[dev-overlay] deprecate `devIndicators` options `appIsrStatus` and `buildActivity` (#76067) ### Why? Since the new dev indicator supersedes the existing `appIsrStatus` (Static Route Indicator) and `buildActivity` (Compilation Indicator), deprecate them before we fully remove the old overlay. ### Follow Up After removing the old overlay's sources, we can remove any logic that `appIsrStatus ` and `buildActivity` were holding for the old overlay. Closes NDX-836