fix(frontend): Credentials disabling onboarding Run button (#11244)

## Changes 🏗️

The onboarding `Run` button is disabled sometimes when an agent
requiring credentials is selected. We think this can be because the
credentials load _async_ by a sub-component ( `<CredentialsInputs />` ),
and there wasn't a way for the parent component to know whether they
loaded or not.

- Refactored **Step 5** of onboarding to adhere to our code conventions
  - split concerns and colocated state
  - used generated API hooks
  - the UI will only render once API calls succeed
- Created a system where ``<CredentialsInputs />` notify the parent
component when they load
- Did minor adjustments here and there

## Checklist 📋

### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
- [x] I will know once I find an agent with credentials that I can
run....


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added visual agent selection card displaying agent details during
onboarding
  * Introduced credentials input management for agent configuration
  * Added onboarding guidance for initiating agent runs

* **Improvements**
  * Enhanced onboarding flow with improved state management
  * Refined login state handling
  * Adjusted spacing in agent rating display

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

autogpt_platform/frontend/package.json

@@ -55,7 +55,7 @@
     "@sentry/nextjs": "10.15.0",
     "@supabase/ssr": "0.6.1",
     "@supabase/supabase-js": "2.55.0",
-    "@tanstack/react-query": "5.85.3",
+    "@tanstack/react-query": "5.87.1",
     "@tanstack/react-table": "8.21.3",
     "@types/jaro-winkler": "0.2.4",
     "@vercel/analytics": "1.5.0",
@@ -103,7 +103,7 @@
     "shepherd.js": "14.5.1",
     "sonner": "2.0.7",
     "tailwind-merge": "2.6.0",
-    "tailwind-scrollbar": "4.0.2",
+    "tailwind-scrollbar": "3.1.0",
     "tailwindcss-animate": "1.0.7",
     "uuid": "11.1.0",
     "vaul": "1.1.2",