[umbrella for appDir migration] Add missing routes to App Router for `/settings` route group

[hbjORbj]

Nested Routes under /settings route group:

• [x] settings/admin/**/* #15748 (WIP)
• [x] settings/billing #16312 (WIP)
• [x] settings/developer/**/* #16286, #16312 (WIP)
• [ ] settings/license-key/**/* (Benny)
• [x] settings/my-account/**/* #16312 (WIP)
• [ ] settings/organizations/attributes/**/* (Benny)
• [x] settings/organizations/admin-api #16312 (WIP)
• [ ] settings/organizations/dsync (Benny)
• [ ] settings/organizations/privacy (Benny)
• [x] settings/organizations/sso #16312 (WIP)
• [x] settings/organizations/[id]**/* #16334 (WIP)
• [x] settings/organizations/new #16334 (WIP)
• [x] settings/platform/**/* #16334 (WIP)
• [x] settings/security/**/* (DONE)
• [x] settings/teams/**/* (DONE)

Routes under /settings route group that are in App Router but not in Pages Router

• [x] settings/teams/[id]/sso #16288 (WIP)

[zomars]

@joeauyeung Can you cross check this list with your Linear issue to avoid stepping on each other toes? 🙏🏽

[hbjORbj]

@joeauyeung Sounds great :D Let me know, happy to collaborate :)

[joeauyeung]

@hbjORbj feel free to book a time with me i.cal.com/joe

[hbjORbj]

@joeauyeung Sure thing, I booked a slot ;)

[hbjORbj]

@joeauyeung I updated the post based on your PR ;) Let's talk about task allocation in the meeting soon