refactor(utils): update deprecated Neovim 0.11 APIs

- Replaced vim.validate() with Lua-style type checks
- Future-proofed utility functions for Neovim 0.11+

Author: Chamal1120

lua/dashboard/utils.lua

@@ -26,9 +26,7 @@ function utils.element_align(tbl)
 end
 
 function utils.get_max_len(contents)
-  vim.validate({
-    contents = { contents, 't' },
-  })
+  assert(type(contents) == 'table', 'contents must be a table')
   local cells = {}
   for _, v in pairs(contents) do
     table.insert(cells, vim.api.nvim_strwidth(v))
@@ -37,11 +35,8 @@ function utils.get_max_len(contents)
   return cells[#cells]
 end
 
--- draw the graphics into the screen center
 function utils.center_align(tbl)
-  vim.validate({
-    tbl = { tbl, 'table' },
-  })
+  assert(type(tbl) == 'table', 'tbl must be a table')
   local function fill_sizes(lines)
     local fills = {}
     for _, line in pairs(lines) do
@@ -100,7 +95,6 @@ function utils.disable_move_key(bufnr)
   end, keys)
 end
 
---- return the most recently files list
 function utils.get_mru_list()
   local mru = {}
   for _, file in pairs(vim.v.oldfiles or {}) do
@@ -113,29 +107,26 @@ end
 
 function utils.get_package_manager_stats()
   local package_manager_stats = { name = '', count = 0, loaded = 0, time = 0 }
-  ---@diagnostic disable-next-line: undefined-global
   if packer_plugins then
     package_manager_stats.name = 'packer'
-    ---@diagnostic disable-next-line: undefined-global
     package_manager_stats.count = #vim.tbl_keys(packer_plugins)
   end
   local status, lazy = pcall(require, 'lazy')
   if status then
     package_manager_stats.name = 'lazy'
-    package_manager_stats.loaded = lazy.stats().loaded
-    package_manager_stats.count = lazy.stats().count
-    package_manager_stats.time = lazy.stats().startuptime
+    local stats = lazy.stats()
+    package_manager_stats.loaded = stats.loaded
+    package_manager_stats.count = stats.count
+    package_manager_stats.time = stats.startuptime
   end
   return package_manager_stats
 end
 
---- generate an empty table by length
 function utils.generate_empty_table(length)
   local empty_tbl = {}
   if length == 0 then
     return empty_tbl
   end
-
   for _ = 1, length do
     table.insert(empty_tbl, '')
   end
@@ -168,7 +159,7 @@ end
 function utils.buf_is_empty(bufnr)
   bufnr = bufnr or 0
   return vim.api.nvim_buf_line_count(0) == 1
-    and vim.api.nvim_buf_get_lines(0, 0, -1, false)[1] == ''
+      and vim.api.nvim_buf_get_lines(0, 0, -1, false)[1] == ''
 end
 
 local last_footer_size = nil
@@ -190,7 +181,7 @@ function utils.add_update_footer_command(bufnr, footer)
     vim.bo[bufnr].modifiable = false
     vim.bo[bufnr].modified = false
 
-    last_footer_size = #args.fargs -- For future calculation of size
+    last_footer_size = #args.fargs
   end, { nargs = '*' })
 end