[Feature] add motions f, F, t, T

[ronnac]

Describe the feature you'd like
Like in vim, allow the commands d, v, y to be combined with motions to find the next / previous occurrence of a character, e.g.
dfx - delete text until the next occurrence of the letter x (on the same line), x included
vTx - visually select text backwards until the previous occurrence of the letter x (on the same line), x not included