feat/chore: rewrite git with job and some other fixes (#743)

* feat/chore: rewrite git with job and some other fixes

* fix: fs clear window, rename echo_warning -> warn

also fix renaming and add an event blocker to avoid running many events
at the same time

lua/nvim-tree/utils.lua

@@ -6,12 +6,16 @@ function M.path_to_matching_str(path)
   return path:gsub('(%-)', '(%%-)'):gsub('(%.)', '(%%.)'):gsub('(%_)', '(%%_)')
 end
 
-function M.echo_warning(msg)
+function M.warn(msg)
   api.nvim_command('echohl WarningMsg')
   api.nvim_command("echom '[NvimTree] "..msg:gsub("'", "''").."'")
   api.nvim_command('echohl None')
 end
 
+function M.str_find(haystack, needle)
+  return vim.fn.stridx(haystack, needle) ~= -1
+end
+
 function M.read_file(path)
   local fd = uv.fs_open(path, "r", 438)
   if not fd then return '' end