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coc.nvim
Nodejs extension host for vim & neovim, load extensions like VSCode and host language servers.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
I believe you are looking for either nvim-telescope (if you happen to use neovim nightly) or fzf.vim
You mentioned Coc, there is actually something builtin called CocSearch, checkout the doc here: https://github.com/neoclide/coc.nvim/blob/71b5766a7cc28daef89fac7db99340cd532035b3/doc/coc.txt#L2297
This plugin does exactly what you described: https://github.com/brooth/far.vim