Add support for Drop In/Components customization for Expo

Is your feature request related to a problem? Please describe.
I appreciate the simplicity of adding Drop In/Components into my Expo app, but I found out that there is no simple way to customize the appearance of them. I found documentation on how to customize components if using React Native but these docs do not apply to my case.
For my project, that uses Expo, the only way to add any customization is by creating a plugin, which is tricky, hard to maintain and adds a little bit of a risk.

Describe the solution you'd like
It would be great to have an ability to customize appearance of these components more easily in Expo. The easiest approach would be to be able to customize it via passing style property to the component configuration, which in turn would modify native code, instead of using plugin

Describe alternatives you've considered
Plugin is the solution I considered, but it is tricky to write and maintain, and only works for small customization, like changing button color/background, before it gets too large to maintain

Start by reading the existing React Native customization documentation and the Expo component configuration path; the issue names no files or tests. Define which Drop In/Components styles can be passed through Expo and how they affect native code, then add coverage demonstrating the supported customization.