Update to handle the new RouterOS v7.18 api syntax with empty responses

[xPucTu4]

• Added handling for ApiEmptySentence in ApiCommand.cs to return an empty list when the first response is empty.
• Introduced !empty case in ApiConnection.cs to process empty responses.
• Created ApiEmptySentence class to manage empty response types, enhancing API functionality.

Closes #103

[Deantwo]

Change looks elegant and follows the same conventions as already used in the project.

[xPucTu4]

Thanks! I was unsure if I should create an ApiEmptySentence or modify the ReSentence, but this way looks cleaner to me.

[Deantwo]

I merged your changes into my own fork's master branch, since @danikf has been MIA for a good while.

[Deantwo]

It looks like you just merged #98 and #99 into your master branch, along with that "Prepare for nuget publishing:", so they are now part of this pull request too. Not sure there is a way to fix that without re-doing your whole pull request. 😨
I don't know if that was my doing somehow. Or if you just clicked a button to pull from upstream or something. 😟

As a reminder, it is usually a good idea to always use a branch on your fork when making a pull request. That way you don't end up with issues like this, where you accidently add more stuff to your master branch.
And as an added bonus, you can give your branches funny descriptive names.

[Deantwo]

You can try making a new branch from the initial commit by going here: https://github.com/xPucTu4/tik4net/tree/4d4ed75f640dfa540d16e1c270653c4532a42512
And then create a branch by clicking the branch button (1), typing a name in the branch dropdown menu's search (2), and then clicking "Create branch" (3).

And then you can create a new pull request to danikf / tik4net : master from xPucTu4 / tik4net : some-name.

[xPucTu4]

Will fix it in a minute.