[Feature Requst] fzf-lua support

[ofseed]

fzf-lua is a recently popular finder plugin (It's better than telescope in my opinion), it seems that leetcode.nvim only supports telescope.nvim, and because it was modified a lot to show some more useful information, it could not replaced by the nvim built-in vim.ui.select. It would be nice if leetcode.nvim support fzf-lua.