feat: add identity provider integration

[hansl]

Done the following:

• Added memory allocation to all wallets.
• Fixed the webpack.config for hte latest changes to authentication and agent
• Removed the hacks to include agent
• site.ts and authClient.ts should be moved to the agent-js repo and packages.
• remove code that doesn't need to be used (like syntax highlighting).

[hansl]

Next time please just advertise your intentions

I'm sorry, my bad for this. I thought I mentioned it in our 1:1 that my target was to implement this. Even if so, I should have made it clearer and written down.

If we do it this way, do you think this will serve as a good example for how open-chat can do it in localdev, their current ic0.app deployment on sodium, etc? starting (for them to use) on Monday.

Yes. But we should move the AuthenticationClient to our own packages, otherwise that file will just keep popping up copy pasted everywhere (which works here as a PoC but not as a real solution).

[gobengo]

hans:

I'll let you merge.