feat(platform): Onboarding flow backend (#9511)

This PR adds backend to make Onboarding UI added in
https://github.com/Significant-Gravitas/AutoGPT/pull/9485 functional and
adds missing confetti screen at the end of Onboarding.

*Make sure to have at least any 2 agents in store when testing locally.*
Otherwise the onboarding will finish without showing agents.
Visit `/onboarding/reset` to reset onboarding state, otherwise it'll
always redirect to `/library` once finished.

### Changes 🏗️

- Onboarding opens automatically on sign up and login (if unfinished)
for all users
- Update db schema to add `UserOnboarding` and add migration
- Add GET and PATCH `/onboarding` endpoints and logic to retrieve and
update data Onboarding for a user
- Update `POST /library/agents` endpoint
(`addMarketplaceAgentToLibrary`), so it includes input and output nodes;
these are needed to know input schema for the Onboarding
- Use new endpoints during onboarding to fetch and update data
- Use agents from the marketplace and their input schema for the
onboarding
- Add algorithm to choose store agents based on user answers and related
endpoint `GET /onboarding/agents`
- Redirect outside onboarding if finished and resume on proper page
- Add `canvas-confetti` and `@types/canvas-confetti` frontend packages
- Add and show congrats confetti screen when user runs and agent and
before opening library
- Minor design updates and onboarding fixes

### 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] Redirect to `/onboarding/*` on sign up and sign in (if onboarding
unfinished)
  - [x] Onboarding works and can be finished
  - [x] Agent runs on finish
- [x] Onboarding state is saved and logging out or refreshing page
restores correct state (user choices)
- [x] When onboarding finished, trying to go into `/onboarding`
redirects to `/library`

---------

Co-authored-by: Nicholas Tindle <nicholas.tindle@agpt.co>
Co-authored-by: Reinier van der Leer <pwuts@agpt.co>

autogpt_platform/frontend/yarn.lock

@@ -3237,10 +3237,10 @@
     "@storybook/react-dom-shim" "8.5.3"
     "@storybook/theming" "8.5.3"
 
-"@storybook/test-runner@^0.20.1":
-  version "0.20.1"
-  resolved "https://registry.yarnpkg.com/@storybook/test-runner/-/test-runner-0.20.1.tgz#e2efa6266d512312a6b810db376da2919008cccd"
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+"@storybook/test-runner@^0.21.0":
+  version "0.21.3"
+  resolved "https://registry.yarnpkg.com/@storybook/test-runner/-/test-runner-0.21.3.tgz#20ad7a9ee20811c51f332557e362733df2c31c4b"
+  integrity sha512-tsorR0IVYElcaTZrT/ZrH/8YDw7c+wrLDN0e3qj1WdbqU8l2IU4+a32HLXaakzdDpuTn+d8xCk4VZMlzMrmToA==
   dependencies:
     "@babel/core" "^7.22.5"
     "@babel/generator" "^7.22.5"
@@ -3526,6 +3526,11 @@
   dependencies:
     "@babel/types" "^7.20.7"
 
+"@types/canvas-confetti@^1.9.0":
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/@types/canvas-confetti/-/canvas-confetti-1.9.0.tgz#d1077752e046413c9881fbb2ba34a70ebe3c1773"
+  integrity sha512-aBGj/dULrimR1XDZLtG9JwxX1b4HPRF6CX9Yfwh3NvstZEm1ZL7RBnel4keCPSqs1ANRu1u2Aoz9R+VmtjYuTg==
+
 "@types/connect@3.4.36":
   version "3.4.36"
   resolved "https://registry.yarnpkg.com/@types/connect/-/connect-3.4.36.tgz#e511558c15a39cb29bd5357eebb57bd1459cd1ab"
@@ -4932,6 +4937,11 @@ caniuse-lite@^1.0.30001579, caniuse-lite@^1.0.30001688:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001697.tgz#040bbbb54463c4b4b3377c716b34a322d16e6fc7"
   integrity sha512-GwNPlWJin8E+d7Gxq96jxM6w0w+VFeyyXRsjU58emtkYqnbwHqXm5uT2uCmO0RQE9htWknOP4xtBlLmM/gWxvQ==
 
+canvas-confetti@^1.9.3:
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/canvas-confetti/-/canvas-confetti-1.9.3.tgz#ef4c857420ad8045ab4abe8547261c8cdf229845"
+  integrity sha512-rFfTURMvmVEX1gyXFgn5QMn81bYk70qa0HLzcIOSVEyl57n6o9ItHeBtUSWdvKAPY0xlvBHno4/v3QPrT83q9g==
+
 case-sensitive-paths-webpack-plugin@^2.4.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/case-sensitive-paths-webpack-plugin/-/case-sensitive-paths-webpack-plugin-2.4.0.tgz#db64066c6422eed2e08cc14b986ca43796dbc6d4"