neovim: Add tex plugin, and disable auto-loading on chdir

it can cause a dead loop when you chdir and a buffer is from the
previous dir.

nvim/.config/nvim/init.vim

@@ -31,6 +31,10 @@ set autoindent
 " Syntax highlighting
 set syntax=on
 
+" LaTeX
+let g:vimtex_view_general_viewer = 'okular'
+let g:vimtex_view_general_options = '--unique file:@pdf\#src:@line@tex'
+
 let g:special_filetype_pattern = 'neo-tree\|toggleterm\|minimap'
 
 " Show line numbers on non-toolbar buffers

nvim/.config/nvim/lua/plugins.lua

@@ -148,19 +148,6 @@ return require('packer').startup({function(use)
                     require('neo-tree.sources.manager').show('filesystem')
                 end,
             })
-
-            -- Autoload when directory changed
-            local last_cwd = vim.fn.getcwd()
-            vim.api.nvim_create_autocmd({ 'DirChanged' }, {
-                callback = function()
-                    local cwd = vim.fn.getcwd()
-                    if (cwd == last_cwd) then
-                        return
-                    end
-                    last_cwd = cwd
-                    require("persisted").load()
-                end
-            })
         end,
     }
 
@@ -174,6 +161,9 @@ return require('packer').startup({function(use)
             })
         end,
     }
+
+    -- LaTeX plugin
+    use "lervag/vimtex"
 end,
 config = {
     display = {