feat: add package and name to URL params

[frankcalise]

Summary

• Closes How to fill in app name and package inputBox #373
• Allows for the user to provide query params for package and name in addition to the existing to/from versions
• Query param values are sent to the input boxes as the default value
• URL is updated when user updates the What's your app name? and What's your app package? inputs
• Closely follows the same way the version params worked

Test Plan

upgrade-helper-373.mp4

Important

While testing, I did notice there were parts of the source code that did not receive anything but the placeholder value for the app package identifier com.rndiffapp. This mostly seemed isolated to the Android diffs, where package or namespace is set.

Opened another issue with this info @ #382

What are the steps to reproduce?

1. Initially add query params to the url, such as http://localhost:3000/?package=com.test.app&name=MyApp

• Observe that the form contains the passed in values
• Observe that the Show me how to upgrade! result incorporates these values

2. Update the inputs (package and/or name) using the form and press Show me how to upgrade!

• Observe that the URL updates accordingly

Checklist

• I tested this thoroughly
• I added the documentation in README.md (if needed)

[pvinis]

very nice, thank you!

[markrickert]

Awesome!