Minor tweaks to improve lacking feedback with default setup

[ryuheechul]

Hi 👋🏼, I just tried out leap.nvim for the first time.

I have installed lightspeed.nvim long time ago and I actually haven't used it as I forgot about it.

But as this time I discovered leap.nvim, I spent more time to get a feel about the productivity boosts from leap.nvim and I think I like it and hope to stick with it.

Few things were confusing as a beginner though.

Unlike lightspeed.nvim there was no visual feedback when I pressed a key, s for example.

Luckily there is a FAQ that mentions about where to customize to deal with these cases.

What I ended up being satisfied is below just in case anyone is curious.

-- to give a feedback on search area by make characters bold instead of changing colors
vim.api.nvim_set_hl(0, 'LeapBackdrop', { bold = true })

-- to give feedback on first two characters I'm searching for instead of not giving any feedback at all
require('leap').opts.highlight_unlabeled_phase_one_targets = true

You can find the corresponding commit on my dotfiles repo is at ryuheechul/dotfiles@a5e1df1.