Add vimtex and neotree

lua/custom/plugins/vimtex.lua

@@ -0,0 +1,29 @@
+-- File: lua/custom/plugins/vimtex.lua
+
+return {
+  'lervag/vimtex',
+  config = function()
+    -- vimtex configurations
+    vim.g.vimtex_compiler_latexmk = {
+      build_dir = 'build',
+      executable = 'latexmk',
+      options = {
+        '-pdf',
+        '-interaction=nonstopmode',
+        '-synctex=1',
+      },
+    }
+
+    -- Enable automatic compilation on save
+    vim.g.vimtex_autocompile = {
+      continuous = 1,
+      on_insert_leave = 1,
+    }
+
+    -- Enable PDF preview using your favorite PDF viewer
+    vim.g.vimtex_view_method = 'zathura'
+    -- vim.g.vimtex_view_general_viewer = 'okular'
+    -- vim.g.vimtex_view_general_options = '--unique file:@pdf\\#src:@line@tex'
+  end,
+}
+