VapourNvim VS glow.nvim

OP and others: vim / neovim can be actual IDEs, with debuggers, autocomplete, filesystem selects, etc. There's even distros of neovim out there, like https://github.com/LunarVim/LunarVim & https://github.com/NvChad/NvChad & https://github.com/VapourNvim/VapourNvim (for people who don't want to fiddle with config or want starting points)

Havent tried it, but if you just want to test it out, a neovim distro like lunarvim or vapourvim might get you up and running with it quicker.

When you are talking about being as close as possible to an actual IDE, you should have a look at VapourNvim.

You can have a look at projects like nvchad, lunarvim or vapour nvim. However, those are just examples. You can open this link and use exactly what you want and how you want.

The main repository Wiki mentions the plugin nvim-tree.lua as its file explorer.

You can find it here

Try this plugin called glow

Perhaps take a look at Glow.nvim?

Something like this might be interesting: But I guess you might be looking for something more integrated. https://github.com/ellisonleao/glow.nvim

https://github.com/ellisonleao/glow.nvim - A must for getting live in buffer previews

You want the preview in neovim itself and not in an external application? What kind of preview did you have in mind? Neovim typically runs in a terminal, and in the terminal, you typically can't have graphics or multiple fonts or other things advanced markdown would support. There are plugins that would preview with something like glow—see here. Not sure if that would met your needs.

i usually use https://github.com/ellisonleao/glow.nvim for quick in-terminal peeks, and https://github.com/iamcco/markdown-preview.nvim (browser and terminal side-by-side) if I need to refer while editing.

I don't know about brow.sh but you can do it with glow.nvim, which uses Glow