Swift Auth Alpha

[chadyj]

See WalletConnect/walletconnect-docs#253 for scope and brief.

• Auth Respond Subscriber #396
• Auth Request Subscriber #395
• SIWE Message Formatter #394
• Add Auth request and response protocol methods #380
• Add Auth Core types #379
• Auth Respond Service #377
• Auth Request Service #376
• Create Pair Service for App #375
• Pair Service for Wallet #374
• Create Auth target #367
• E2E tests for Auth Clients #416
• Auth Instance wrapper #415
• CACAO Signer #390
• CACAO Verifier #389
• Auth networking interactor #382
• Auth Client #378
• Auth public api documentation #464
• [Auth] handle error response #459
• Integrate auth in sample apps #451
• [Auth] Quick start tutorial #476
• Bug and release testing
• tests with js and kotlin