feat(platform): setup and configure orval (#10209)

This pull request sets up and configures Orval for API client
generation. It automates the process of creating TypeScript clients from
the backend's OpenAPI specification, improving development efficiency
and reducing manual code maintenance.

### Changes 🏗️

- Configures Orval with a new configuration file (`orval.config.ts`).
- Adds scripts to `package.json` for fetching the OpenAPI spec and
generating the API client.
- Implements a custom mutator for handling authentication.
- Adds API client generation as a step in the CI workflow.
- Adds `.gitignore` entry for generated API client files.
- Adds a security middleware to prevent caching of sensitive data.

### 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] Verified that the API client is generated correctly.
- [x] Confirmed that the custom mutator is functioning as expected for
authentication.
- [x] Ensured that the new CI workflow step for API client generation is
successful.
  - [x] Tested generated API calls

#### For configuration changes:
- [x] `.env.example` is updated or already compatible with my changes
- [ ] `docker-compose.yml` is updated or already compatible with my
changes
- [x] I have included a list of my configuration changes in the PR
description (under **Changes**)

.gitignore

@@ -165,7 +165,7 @@ package-lock.json
 
 # Allow for locally private items
 # private
-pri* 
+pri*
 # ignore
 ig*
 .github_access_token
@@ -177,3 +177,6 @@ autogpt_platform/backend/settings.py
 *.ign.*
 .test-contents
 .claude/settings.local.json
+
+# Auto generated client
+autogpt_platform/frontend/src/api/__generated__