feat: split warning messages into multiple lines

[Akmadan23]

Now that notifications are scheduled, having multiple line messages should not be an issue anymore. This way warnings are far easier to read.

[alex-courtis]

Works nicely for nvim-notify:

      ╭──────────────────────────────────────────────────────────────╮
~     │  NvimTree                                          12:45:31 │
~     │━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━│
~     │[NvimTree]                                                    │
~     │Invalid option: ui.confirm.trash. Expected boolean, got string│
~     │Invalid value for field view.side: 'bottom'                   │
~     │                                                              │
~     │see :help nvim-tree-opts for available configuration options  │
~     ╰──────────────────────────────────────────────────────────────╯

[alex-courtis]

This is great as it also gets us around the silly neovim/neovim#17832 problem which has been hiding startup messages.

Keep up the great work @Akmadan23 !