docs(telescope): add telescope loadable function

autoload/SpaceVim/layers/telescope.vim

@@ -6,6 +6,10 @@
 " License: GPLv3
 "=============================================================================
 
+if exists('s:file')
+  finish
+endif
+
 ""
 " @section telescope, layers-telescope
 " @parentsection layers
@@ -33,6 +37,12 @@
 "   <Leader> f r      Resumes Unite window
 " <
 
+function! SpaceVim#layers#telescope#loadable() abort
+
+  return has('nvim-0.7.0')
+
+endfunction
+
 function! SpaceVim#layers#telescope#plugins() abort
   let plugins = []
   call add(plugins, [g:_spacevim_root_dir . 'bundle/telescope.nvim', {'merged' : 0, 'loadconf' : 1}])

docs/layers/telescope.md

@@ -8,6 +8,8 @@ description: "This layer provides a heavily customized telescope centric workflo
 ## Description
 
 This layer is a heavily customized wrapper for [telescope.nvim](https://github.com/nvim-telescope/telescope.nvim) and it's sources.
+The `telescope` layer is only for nvim 0.7 or above.
+
 
 ## Install