feat(words): add combobox

[tier4-autoware-public-bot]

this word is not necessary, normally we should use

• combo_box
• ComboBox
• combo box
  etc..

But there are some cases where cobobox is used, so it is ok to be allowed to use.

[HansRobo]

@kosuke55
I think in many cases "combobox" can be split into "combo" and "box".
Are there any situations where you need "combobox" instead of "combo_box" or "ComboBox"?

[kosuke55]

@HansRobo
oh, thanks. No it's not necessary, I can use "combo_box" or "ComboBox".
I just added without thinking well 🙏

[kosuke55]

I searched in google and found some combobox cases, so is it ok not to revert this time?

[HansRobo]

I think there is no problem if you have a reason to add it.
However, you need to write it in the description.