Add mappings for tmux

lua/custom/mappings.lua

@@ -0,0 +1,12 @@
+local M = {}
+
+M.general = {
+  n = {
+    ['<C-h>'] = { '<cmd> TmuxNavigateLeft<CR>', 'window left' },
+    ['<C-l>'] = { '<cmd> TmuxNavigateRight<CR>', 'window right' },
+    ['<C-j>'] = { '<cmd> TmuxNavigateDown<CR>', 'window down' },
+    ['<C-k>'] = { '<cmd> TmuxNavigateUp<CR>', 'window up' },
+  },
+}
+
+return M

lua/custom/plugins/vim-tmux-navigator.lua

@@ -0,0 +1,6 @@
+return {
+  {
+    'christoomey/vim-tmux-navigator',
+    lazy = false,
+  },
+}