docs: add statusline section

Author: roosta

doc/srcery.txt

@@ -35,7 +35,7 @@ change any of these you’d put something like this in your `.vimrc` or
 
 Make sure that you set these variables before assigning `colorscheme`.
 
-BOLD                                                         *srcery-option-bold*
+BOLD                                                      *srcery-option-bold*
 
 Enables bold text.
 >vim
@@ -147,4 +147,21 @@ assigned.
   let g:srcery_gray5 = '#45433E'
   let g:srcery_gray6 = '#504D47'
 
+==============================================================================
+STATUSLINE                                                 *srcery-statusline*
+
+Srcery supports several statuslines, they all follow the same coloring scheme
+with some minor differences.
+
+- https://github.com/nvim-lualine/lualine.nvim
+- https://github.com/vim-airline/vim-airline 
+- https://github.com/itchyny/lightline.vim
+
+The only one requiring configuration is `lightline`:
+>vim
+  let g:lightline = { 'colorscheme': 'srcery' }
+>lua
+  vim.g.lightline = { colorscheme = 'srcery' }
+
+
 vim: tw=78:ts=8:ft=help:norl:noet:fen:noet :