Add user autocmd TelescopeFindPre (#491)

* Add user autocmd Telescope

* change name to TelescopeFindPre

* update Readme for Telescope user autocmds

README.md

@@ -520,6 +520,15 @@ Telescope find_files theme=get_dropdown
 Themes should work with every `telescope.builtin` function.  If you wish to
 make theme, check out `lua/telescope/themes.lua`.
 
+## Autocmds
+
+Telescope user autocmds:
+
+| Event                           | Description                                        |
+|---------------------------------|----------------------------------------------------|
+| `User TelescopeFindPre`         | Do it before create Telescope all the float window |
+| `User TelescopePreviewerLoaded` | Do it after Telescope previewer window create      |
+
 
 ## Extensions
 

lua/telescope/pickers.lua

@@ -326,6 +326,9 @@ function Picker:find()
 
   self.original_win_id = a.nvim_get_current_win()
 
+  -- User autocmd run it before create Telescope window
+  vim.cmd'do User TelescopeFindPre'
+
   -- Create three windows:
   -- 1. Prompt window
   -- 2. Options window