Tweak Telescope mappings to my liking

lua/plugins/telescope.lua

@@ -4,7 +4,23 @@ return {
     'nvim-lua/plenary.nvim',
   },
   config = function()
-    require('telescope').setup({})
+    local telescope = require('telescope')
+    telescope.setup({
+      defaults = {
+        mappings = {
+          i = {
+            ['<C-s>'] = 'select_horizontal',
+            ['<C-h>'] = 'preview_scrolling_left',
+            ['<C-l>'] = 'preview_scrolling_right',
+          },
+          n = {
+            ['<C-s>'] = 'select_horizontal',
+            ['<C-h>'] = 'preview_scrolling_left',
+            ['<C-l>'] = 'preview_scrolling_right',
+          }
+        },
+      },
+    })
 
     -- TODO: Add more mappings?
     local opts = { noremap = true }