Remove duplicated search current word code
Remove duplicated search current word code

Combine implementation of all four search commands (`*`, `#`, `g*`, `g#`) into a single function taking a `direction` and `isExact` argument.

Chillee/VSCodeNeovim,Chillee/Vim,Chillee/VSCodeNeovim,westim/Vim,VSCodeVim/Vim,westim/Vim,westim/Vim,Chillee/VSCodeNeovim,VSCodeVim/Vim,Chillee/Vim