write some comments for the different mini modules' functionalities

.config/nvim/lua/plugin/mini.lua

@@ -12,10 +12,10 @@ if not (vim.uv or vim.loop).fs_stat(mini_path) then
 	vim.cmd('echo "Installed [`mini.nvim`](../doc/mini-nvim.qmd#mini.nvim)" | redraw')
 end
 
-require('mini.ai').setup()
-require('mini.surround').setup()
-require('mini.move').setup()
-require('mini.operators').setup()
+require('mini.ai').setup()        -- enhances the use of a/i textobjects
+require('mini.move').setup()      -- moving lines
+require('mini.operators').setup() -- duplicating lines and evaluating equations inline
+require('mini.surround').setup()  -- surround stuff
 
 require('mini.indentscope').setup({
 	symbol = '¦',