feat: add warning message when using PackerSync on snapshot branches

lua/core/utils.lua

@@ -160,4 +160,38 @@ M.load_override = function(default_table, plugin_name)
    return default_table
 end
 
+M.packer_sync = function(...)
+   local git_exists, git = pcall(require, "nvchad.utils.git")
+   local defaults_exists, defaults = pcall(require, "nvchad.utils.config")
+   local packer_exists, packer = pcall(require, "packer")
+
+   if git_exists and defaults_exists then
+      local current_branch_name = git.get_current_branch_name()
+
+      -- warn the user if we are on a snapshot branch
+      if current_branch_name:match(defaults.snaps.base_snap_branch_name .. "(.+)" .. "$") then
+         vim.api.nvim_echo({
+            { "WARNING: You are trying to use ", "WarningMsg" },
+            { "PackerSync" },
+            { " on a NvChadSnapshot. This will cause issues if NvChad dependencies contain "
+                .. "any breaking changes! Plugin updates will not be included in this "
+                .. "snapshot, so they will be lost after switching between snapshots! Would "
+                .. "you still like to continue? [y/N]\n", "WarningMsg" }
+         }, false, {})
+
+         local ans = vim.trim(string.lower(vim.fn.input("-> ")))
+
+         if ans ~= "y" then
+            return
+         end
+      end
+   end
+
+   if packer_exists then
+      packer.sync(...)
+   else
+      error("Packer could not be loaded!")
+   end
+end
+
 return M