feat(messages): migrate message thread create page to React

[wescopeland]

This PR finalizes the messaging system's migration to React. In this branch, both the PHP UI and React UI for the new create page are present.

How to test this PR:

sail artisan migrate

http://localhost:64000/messages/create2
http://localhost:64000/messages/create

You should also test various template scenarios, ie:

http://localhost:64000/messages/create2?message=I%27d%20like%20to%20report%20an%20unwelcome%20concept%20in%20%5Bach%3D24%5D.%0A%20%20%0A-%20Which%20Unwelcome%20Concept%3A%0A%28Insert%20which%20concept%20from%20the%20docs%20here%29%0A%20%20%0A-%20Detailed%20Explanation%3A%0A%28Provide%20as%20much%20detail%20as%20possible%20here.%20Assume%20the%20reader%20may%20not%20have%20played%20the%20game%20before.%20The%20more%20detail%20you%20provide%2C%20the%20better%20your%20case.%29&subject=Unwelcome%20Concept%3A%20Bouncing%20Combo%20Master%20%5B24%5D%20%28Sonic%20the%20Hedgehog%29&templateKind=unwelcome-concept&to=DevCompliance

One important technical note is the use of a fulltext index for user searches. Each search query takes approximately 10ms at a result, down from 3,000ms when using LIKE.

Before

After