Adds authentication and pricing pages for user onboarding

Introduces comprehensive user authentication flow with plan selection and registration

Includes:
- Pricing page with plan details and selection
- Payment page with plan summary and card information
- Signup page for different plan tiers
- Shared authentication layout and design system improvements

Enhances user onboarding experience with clear plan information and streamlined signup process

PTWork.code-workspace

@@ -8,6 +8,7 @@
 		}
 	],
 	"settings": {
-		"liveServer.settings.port": 5501
+		"liveServer.settings.port": 5501,
+		"liveServer.settings.multiRootWorkspaceName": "Calendar"
 	}
 }