feat: apply paste_command and execute_command to visual selection

[mikesmithgh]

Apply paste_command and execute_command to visual selection.

  vim.keymap.set({ 'n', 'i' }, '<Plug>(KsbExecuteCmd)', ksb_api.execute_command, { buffer = bufid })
  vim.keymap.set({ 'n', 'i' }, '<Plug>(KsbPasteCmd)', ksb_api.paste_command, { buffer = bufid })

e.g., user visually selects content in scrollback buffer and presses <S-CR> should paste the visual selection to Kitty.

This removes an extra step of yanking to the paste window and then pressing <S-CR>

[tummetott]

Yes I had exactly the same idea while configuring this plugin

[mikesmithgh]

Hey @tummetott, I just added this! Let me know if you have any issues.

[mikesmithgh]

closed by #134