Adds two essential telescope keymaps (nvim-lua#528)

* Added keymap for select Telescope picker

* Added keymap for search in all open files

(cherry picked from commit 3824342)

init.lua

@@ -521,6 +521,14 @@ vim.keymap.set('n', '<leader>/', function()
   })
 end, { desc = '[/] Fuzzily search in current buffer' })
 
+local function telescope_live_grep_open_files()
+  require('telescope.builtin').live_grep {
+    grep_open_files = true,
+    prompt_title = 'Live Grep in Open Files',
+  }
+end
+vim.keymap.set('n', '<leader>s/', telescope_live_grep_open_files, { desc = '[S]earch [/] in Open Files' })
+vim.keymap.set('n', '<leader>ss', require('telescope.builtin').builtin, { desc = '[S]earch [S]elect Telescope' })
 vim.keymap.set('n', '<leader>gf', require('telescope.builtin').git_files, { desc = 'Search [G]it [F]iles' })
 vim.keymap.set('n', '<leader>sf', require('telescope.builtin').find_files, { desc = '[S]earch [F]iles' })
 vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc = '[S]earch [H]elp' })