feat(platform): Onboarding Phase 2 (#9736)

### Changes 🏗️

- Update onboarding to give user rewards for completing steps
- Remove `canvas-confetti` lib and add `party-js` instead; the former
didn't allow to play confetti from a component
- Add onboarding videos in `frontend/public/onboarding/`
- Remove Balance (`CreditsCard.tsx`) and add openable `Wallet.tsx` (and
accompanying `WalletTaskGroup.tsx`) instead that displays grouped
onboarding tasks with descriptions and short instructional videos
- Further relevant updates to `useOnboarding`, `types.ts`
- Implement onboarding rewards
- Add `onboarding_reward` function in `credit.py` that is used to reward
user for finished onboarding tasks safely - transaction key is
deterministic, so the same user won't be rewarded twice for the same
step.
  - Add `reward_user` in `onboarding.py`
- Update `UserOnboarding` model and add a migration

<img width="464" alt="Screenshot 2025-04-05 at 6 06 29 PM"
src="https://github.com/user-attachments/assets/fca8d09e-0139-466b-b679-d24117ad01f0"
/>

### 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] Onboarding works
  - [x] Tasks can be completed
  - [x] Rewards are added correctly for all completed tasks

autogpt_platform/frontend/package.json

@@ -52,7 +52,6 @@
     "@xyflow/react": "12.4.2",
     "ajv": "^8.17.1",
     "boring-avatars": "^1.11.2",
-    "canvas-confetti": "^1.9.3",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "1.0.4",
@@ -70,6 +69,7 @@
     "moment": "^2.30.1",
     "next": "^14.2.26",
     "next-themes": "^0.4.5",
+    "party-js": "^2.2.0",
     "react": "^18",
     "react-day-picker": "^9.6.1",
     "react-dom": "^18",