Behaviour of `takeP` on `Continue` when `take` ends.

[adithyaov]

By @harendra-kumar,

This is a tricky case, we have the following options:

1. Done 0 with extract as you have written
2. Done n, will require buffering elements
3. Use a backtracking fold and not a parser, once we have backtracking in folds

See https://github.com/composewell/streamly/pull/1171#discussion_r682665351