docs: mention extra dependencies in README (#313)

Closes #306

README.md

@@ -110,6 +110,14 @@ This is the preferred installation method.
 }
 ```
 
+Notice that yazi.nvim adds some minimal dependencies for you automatically when
+using a plugin manager like lazy.nvim. To see which dependencies are installed,
+see [lazy.lua](./lazy.lua). If you are not using lazy.nvim (or
+[rocks.nvim](https://github.com/nvim-neorocks/rocks.nvim?tab=readme-ov-file)),
+you need to install the dependencies yourself. Also see the discussion in
+[issue 306](https://github.com/mikavilpas/yazi.nvim/issues/306) and examples of
+[other Neovim plugins using this feature](https://github.com/search?q=path%3A%2F%5Elazy%5C.lua%24%2F&type=code).
+
 ### Without a package manager
 
 <details>

lazy.lua

@@ -1,14 +1,26 @@
 -- This file is used to define the dependencies of this plugin when the user is
 -- using lazy.nvim.
 --
+-- If you are curious about how exactly the plugins are used, you can use e.g.
+-- the search functionality on Github.
+--
 --https://lazy.folke.io/packages#lazy
 
 ---@module "lazy"
 ---@module "yazi"
 
 ---@type LazySpec
 return {
+  -- Needed for file path resolution mainly
+  --
+  -- https://github.com/nvim-lua/plenary.nvim/
   { 'nvim-lua/plenary.nvim', lazy = true },
+
+  -- Needed to calculate a good buffer background color that fits the current
+  -- theme when yazi hovers over a file in an open window/split. The plugin
+  -- itself is never actually loaded, only some utilities that it comes with.
+  --
+  -- https://github.com/akinsho/bufferline.nvim
   { 'akinsho/bufferline.nvim', lazy = true },
 
   --