Adding shallow option to git clone step

lua/lazy/manage/task/git.lua

@@ -67,6 +67,10 @@ M.clone = {
       self.plugin.url,
     }
 
+    if self.plugin.shallow ~= false then
+       args[#args+1] = "--depth=1"
+    end
+
     if Config.options.git.filter then
       args[#args + 1] = "--filter=blob:none"
     end

lua/lazy/types.lua

@@ -32,6 +32,7 @@
 ---@field module? false
 
 ---@class LazyPluginRef
+---@field shallow? boolean clones the plugin with --depth=1
 ---@field branch? string
 ---@field tag? string
 ---@field commit? string