feat(term): ansi: implement wrap and wordwrap

[aymanbagabas]

This is based on @muesli's awesome
reflow library. It uses the ANSI parser state machine to find escape codes and runes. Since it uses the ANSI parser state machine, it supports OSC, DCS, and other sequences.

Related: muesli/reflow#71

Benchmarks running against reflow:

› go test -bench=. -benchmem -run=^$ ./ansi/...
goos: darwin
goarch: amd64
pkg: github.com/charmbracelet/x/exp/term/ansi
cpu: Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
BenchmarkWrap-16                19056892                66.83 ns/op          111 B/op          1 allocs/op
BenchmarkReflowWrap-16           9982068               122.7 ns/op           164 B/op          4 allocs/op
BenchmarkWordwrap-16             7652895               161.3 ns/op           287 B/op          4 allocs/op
BenchmarkReflowWordwrap-16       4818664               254.0 ns/op           287 B/op          4 allocs/op
PASS

[mikelorant]

Added some comments, I am fairly intermediate in my Go skills, so take them as observations. I may very well be wrong in my suggestions.

[aymanbagabas]

Added some comments, I am fairly intermediate in my Go skills, so take them as observations. I may very well be wrong in my suggestions.

Thank you @mikelorant for reviewing this one!