Support nonce CSP with React Router + RSC

[Master-Hash]

I've built a sample program, running on React Router + RSC, with nonce setup.

https://playground-rsc.hash.memorial/

Source code on https://github.com/Master-Hash/react-router/tree/rsc

My purpose is:

1. To see how much the RR source code should be modified;
2. To know when can I migrate my own app.

From the source code, I found the ssr environment is designed to get nonce from payload. However it's against my knowledge, that nonce should be generate with HTML, so in ssr entry. So I modify the source code a little.

If my implement is good enough for pr, please tell me! @brophdawg11

Edit: there is known bug on deployed version when client navigates, reason unknown local pnpm start works correctly
Edit 2: Now fixed