fix: #96 improve startup time

For those who do not use the git branching feature, this may improve their Neovim startup time significantly

lua/persisted/init.lua

@@ -41,10 +41,11 @@ end
 ---Get the current Git branch
 ---@return string
 function M.get_branch()
+  if config.options.use_git_branch then
     vim.fn.system([[git rev-parse 2> /dev/null]])
     local git_enabled = (vim.v.shell_error == 0)
 
-  if config.options.use_git_branch and git_enabled then
+    if git_enabled then
       local branch = vim.fn.systemlist([[git rev-parse --abbrev-ref HEAD 2>/dev/null]])
       if vim.v.shell_error == 0 then
         branch = config.options.branch_separator .. branch[1]:gsub("/", "%%")
@@ -62,6 +63,7 @@ function M.get_branch()
         end
       end
     end
+  end
 
   return config.options.branch_separator .. default_branch
 end