Initial nvim customization

* disabled arrowkeys in normal mode
* added <leader>pv as a shortcut for opening the file explorer
* fixed mason-lspconfig by adding required attributes 'automatic_installation' and 'ensure_installed'
* changed indent_width to 4

.stylua.toml

@@ -1,6 +1,6 @@
 column_width = 160
 line_endings = "Unix"
 indent_type = "Spaces"
-indent_width = 2
+indent_width = 4
 quote_style = "AutoPreferSingle"
 call_parentheses = "None"

init.lua

@@ -166,6 +166,7 @@ vim.keymap.set('n', '<Esc>', '<cmd>nohlsearch<CR>')
 -- Diagnostic keymaps
 vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })
 
+vim.keymap.set('n', '<leader>pv', vim.cmd.Ex)
 -- Exit terminal mode in the builtin terminal with a shortcut that is a bit easier
 -- for people to discover. Otherwise, you normally need to press <C-\><C-n>, which
 -- is not what someone will guess without a bit more experience.
@@ -175,10 +176,10 @@ vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagn
 vim.keymap.set('t', '<Esc><Esc>', '<C-\\><C-n>', { desc = 'Exit terminal mode' })
 
 -- TIP: Disable arrow keys in normal mode
--- vim.keymap.set('n', '<left>', '<cmd>echo "Use h to move!!"<CR>')
--- vim.keymap.set('n', '<right>', '<cmd>echo "Use l to move!!"<CR>')
--- vim.keymap.set('n', '<up>', '<cmd>echo "Use k to move!!"<CR>')
--- vim.keymap.set('n', '<down>', '<cmd>echo "Use j to move!!"<CR>')
+vim.keymap.set('n', '<left>', '<cmd>echo "Use h to move!!"<CR>')
+vim.keymap.set('n', '<right>', '<cmd>echo "Use l to move!!"<CR>')
+vim.keymap.set('n', '<up>', '<cmd>echo "Use k to move!!"<CR>')
+vim.keymap.set('n', '<down>', '<cmd>echo "Use j to move!!"<CR>')
 
 -- Keybinds to make split navigation easier.
 --  Use CTRL+<hjkl> to switch between windows
@@ -229,7 +230,7 @@ vim.opt.rtp:prepend(lazypath)
 require('lazy').setup({
   -- NOTE: Plugins can be added with a link (or for a github repo: 'owner/repo' link).
   'tpope/vim-sleuth',       -- Detect tabstop and shiftwidth automatically
-
+  'sindrets/diffview.nvim', -- Neovim diff plugin
   -- NOTE: Plugins can also be added by using a table,
   -- with the first argument being the link and the following
   -- keys can be used to configure plugin behavior/loading/etc.
@@ -685,6 +686,8 @@ require('lazy').setup({
             require('lspconfig')[server_name].setup(server)
           end,
         },
+        automatic_installation = true,
+        ensure_installed = {}
       }
     end,
   },