can someone explain?

[CoderTey]

can someone explain how to use it actually i got my neovim config but i still dont understand how to add all plugins and how to connect them or something like that

[BirdeeHub]

I can try

You put the lsps and plugins in the nix file. In lspsAndRuntimeDeps everything which is to be installed will be added to PATH (appended by default, not prepended) and in startupPlugins they will be added to your neovim runtimepath at startup.

These items will only be available within nvim itself, not your whole system. It is possible to add something as a "host" in your settings if you wish it to be available everywhere, for example if you use neovide, but this is an advanced feature you can worry about later.

Then you can set up the lsps using vim.lsp, and the plugins by calling the setup they specify in their readmes

If you put plugins in optionalPlugins, rather than startupPlugins they are not loaded at startup but rather only after you call vim.cmd.packadd on them. This is the builtin nvim method of lazy loading, which you can make more ergonomic via lze or lz.n, although you will probably find that most don't actually need to be lazily loaded.

You can get info from your nix package definition of the current nvim package via the nixCats global, help for that at :help nixCats, if you want to split your stuff into categories, you would use this to see which categories were enabled for that nvim package and conditionally enable or disable things by checking presence of the category.

If you had to pick 1 help file to read to understand the nix side of things, it would be this one, which goes over all the sections you see in the template.