refactor: use betterauth instead of workos

packages/convex/auth.config.ts

@@ -1,20 +1,8 @@
-const clientId = process.env.WORKOS_CLIENT_ID
-
 const authConfig = {
 	providers: [
 		{
-			type: "customJwt",
-			issuer: `https://api.workos.com/`,
-			algorithm: "RS256",
-			jwks: `https://api.workos.com/sso/jwks/${clientId}`,
-			applicationID: clientId,
-		},
-		{
-			type: "customJwt",
-			issuer: `https://api.workos.com/user_management/${clientId}`,
-			algorithm: "RS256",
-			jwks: `https://api.workos.com/sso/jwks/${clientId}`,
-			applicationID: clientId,
+			domain: process.env.CONVEX_SITE_URL,
+			applicationID: "convex",
 		},
 	],
 }