Add a benchmark for scrolling through a large filtered table

[Evertras]

For ensuring #135 is performant. Results seemed to be extremely quick, and this was confirmed by a locally modified example that had 40,000 rows and allowed filtering, with a pagination size of 10 which was also performant.

goos: darwin
goarch: amd64
pkg: github.com/evertras/bubble-table/table
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
BenchmarkPlain3x3TableView-12              23631             50259 ns/op           13334 B/op        348 allocs/op
BenchmarkPlainTableViews/1x1-12           241778              4908 ns/op            1824 B/op         35 allocs/op
BenchmarkPlainTableViews/10x1-12           23725             50341 ns/op           12904 B/op        282 allocs/op
BenchmarkPlainTableViews/1x5-12            65024             18290 ns/op            6506 B/op        142 allocs/op
BenchmarkPlainTableViews/1x20-12           20710             58949 ns/op           33600 B/op        490 allocs/op
BenchmarkPlainTableViews/9x20-12            2672            439013 ns/op          165846 B/op       3843 allocs/op
BenchmarkPlainTableViews/9x50-12            1144           1038650 ns/op          464303 B/op       9426 allocs/op
BenchmarkFilteredScrolling-12            1724365               692.5 ns/op          2052 B/op          2 allocs/op
BenchmarkSelectedRows-12                   64131             19091 ns/op           84192 B/op         11 allocs/op
PASS
ok      github.com/evertras/bubble-table/table  14.091s