vim-ficklefold VS telescope.nvim

If you don't get great results, try changing 'foldmethod' (syntax is usually best but indent often works well). If vim doesn't have syntax support for your language, find a plugin that offers it. Even better if it defines 'foldtext' so your methods collapse down into an easy to read outline. I use vim-ficklefold to manage folds and FastFold to prevent syntax folds from making vim slow.

for telescope.nvim (optional) live grep: ripgrep find files: fd

Here we have a configuration for telescope.nvim, a very popular fuzzy finder.

EDIT: I found what I was looking for https://github.com/nvim-telescope/telescope.nvim and https://github.com/nvim-telescope/telescope-file-browser.nvim

Fuzzy Finder: fzf.vim (for its speed) along with telescope.nvim (for its ecosystem)

Just landed on Telescope.nvim: https://github.com/nvim-telescope/telescope.nvim/pull/2572

This extension allows you to use the power of ast-grep to find code patterns in your editor, using the familiar and awesome interface of telescope.nvim.

telescope.nvim

My solution is using telescope.nvim with lsp extension, and map the vim.lsp.buf.definition keybinding to telescope one https://github.com/nvim-telescope/telescope.nvim