feat: add keymap to insert datetime

Author: setarcos

init.lua

@@ -444,6 +444,8 @@ require('lazy').setup({
       vim.keymap.set('n', '<leader>sr', builtin.resume, { desc = '[S]earch [R]esume' })
       vim.keymap.set('n', '<leader>s.', builtin.oldfiles, { desc = '[S]earch Recent Files ("." for repeat)' })
       vim.keymap.set('n', '<leader><leader>', builtin.buffers, { desc = '[ ] Find existing buffers' })
+      vim.keymap.set('i', '<F3>', '<C-r>=strftime("%Y-%m-%d %H:%M:%S")<cr>')
+      vim.keymap.set('n', '<F3>', 'i<C-r>=strftime("%Y-%m-%d %H:%M:%S")<cr><ESC>')
 
       -- Slightly advanced example of overriding default behavior and theme
       vim.keymap.set('n', '<leader>/', function()