SSAO distance from camera option

## What problem does this solve or what need does it fill?

My game that I use operates on a bit of a different scale than the default Bevy game, and when enabling SSAO the distance that it stops rendering at is WAY too short.

## What solution would you like?

Add an option to configure the distance at which SSAO stops

## What alternative(s) have you considered?

None

## Additional context