replaced markview with markdown

lua/plugins/markdown.lua

@@ -0,0 +1,10 @@
+return {
+  'MeanderingProgrammer/markdown.nvim',
+  dependencies = {
+    'nvim-treesitter/nvim-treesitter',
+    'nvim-tree/nvim-web-devicons',
+  }, -- if you prefer nvim-web-devicons
+  config = function()
+    require('render-markdown').setup({})
+  end,
+}