bfast*classify()

We can adapt BFAST Lite to do multi-breakpoint bfastliteclassify(), bfast01classify(), which is in high demand (and will probably deprecate bfast01 for most use cases). We can just use the same code, with a bfastlite object it should output multiple classified outputs (in a matrix).

Start by locating the existing BFAST Lite implementation and the bfastliteclassify() and bfast01classify() entry points. Compare their current classification behavior, then define how a bfastlite object should represent multiple classified outputs in a matrix and how this relates to the proposed deprecation of bfast01.

Written by the indexing model from the issue text.