Add TextInput component

[utokusa]

This PR is related to #21 .

Summary

This PR allows you to use TextInput component which has similar behavior of <input type="text">.

Features

• React's controlled components model (when value prop is provided)
• OnInput and OnChange callback
• Some basic properties. fontSize, placeholder, maxlength, etc.
• juce::TextEditor's properties. e.g. 'highlight-color' which can be set by juce::Component::setColour() in original JUCE

[nick-thompson]

Awesome work @utokusa thank you. I've looked briefly and the approach generally looks totally right. I want to review in closer detail before merge, will try to get to it in the morning!

[JoshMarler]

Excellent work @utokusa. This looks pretty much ready to merge now. We'll need to publish a new version of the react-juce npm package for this and bump the example project etc. Very happy to pull down your branch to test and push the package changes etc.

@nick-thompson did you want to take a quick pass over this before merge?

[nick-thompson]

@utokusa looks like we have a merge conflict here, would you mind rebasing your branch against the latest master, fixing the conflict, and then force pushing? And then I'll go ahead and merge!

[utokusa]

@nick-thompson I have just rebased and force pushed. Now the commit log is bit strange and my non-latest commits fails to build because of the namespace change. So I think it might be better to squash them. What do you think? Either way, it would be helpful if you could check for the latest commit.

[utokusa]

I noticed that the GitHub Action was failed. Please wait and I will fix it.

[utokusa]

I have just fixed it. The CI really helped me :)

[nick-thompson]

Excellent, thanks again @utokusa! 😃 🚀