feat: Next: Stripe billing and plan management

- Upgrade Stripe.net to v50.4.1 and update the backend to support modern PaymentMethods while maintaining legacy token compatibility.
- Implement a new billing feature in the Svelte UI with lazy-loaded Stripe integration and a functional plan change dialog.
- Add TanStack Query hooks for fetching available plans and processing plan changes with coupon support.

Author: niemyjski

src/Exceptionless.Core/Exceptionless.Core.csproj

@@ -31,7 +31,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.5" />
     <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks" Version="10.0.5" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.5" />
-    <PackageReference Include="Stripe.net" Version="47.4.0" />
+    <PackageReference Include="Stripe.net" Version="50.4.1" />
     <PackageReference Include="System.DirectoryServices" Version="10.0.5" />
     <PackageReference Include="UAParser" Version="3.1.47" />
     <PackageReference Include="Foundatio.Repositories.Elasticsearch" Version="7.18.0-beta4.24" Condition="'$(ReferenceFoundatioRepositoriesSource)' == '' OR '$(ReferenceFoundatioRepositoriesSource)' == 'false'" />

src/Exceptionless.Web/ClientApp/package-lock.json

@@ -71,6 +71,7 @@
         "@exceptionless/fetchclient": "^0.44.0",
         "@internationalized/date": "^3.12.0",
         "@lucide/svelte": "^0.577.0",
+        "@stripe/stripe-js": "^8.10.0",
         "@tanstack/svelte-form": "^1.28.5",
         "@tanstack/svelte-query": "^6.1.0",
         "@tanstack/svelte-query-devtools": "^6.0.4",
@@ -89,6 +90,7 @@
         "runed": "^0.37.1",
         "shiki": "^4.0.2",
         "svelte-sonner": "^1.1.0",
+        "svelte-stripe": "^2.0.0",
         "svelte-time": "^2.1.0",
         "tailwind-merge": "^3.5.0",
         "tailwind-variants": "^3.2.2",
@@ -100,4 +102,4 @@
     "overrides": {
         "storybook": "$storybook"
     }
-}
+}