addVideosGrid

Adds participants to the video grid layout with 100% parity to the React and Flutter SDKs.

This implementation mirrors the exact behavior of Flutter/React:

• Builds components iteratively in a loop

• Updates grids at the LAST iteration of each loop

• Calls updateMiniCardsGrid TWICE per grid (before and after updateOtherGridStreams)

• Handles alt grid removal with the same double-call pattern

Parameters