SAAS Developer for TypeScript Repository Modifications

We are seeking a skilled developer to build a Software as a Service (SAAS) application from an existing TypeScript repository. This repository https://github.com/srcbookdev/srcbook, is similar to bolt.new but uses Websockets. The repository is already working perfectly. I need following features to add into this repository:-

I want following changes in this repository.
1- It should be able to deploy the created repository on my subdomain (subdomain.myurl.com) using vercel or VPS when Clicked publish.
2- User have the ability to add custom domain in place of subdomain using CNAME (vercel or VPS)
3- Mobile/desktop Preview
4- embedding on page (iframe to add as a part of page)

SAAS feature
1- A admin panel
2- Login and social login
3- Payment management (stripe & Paypal)
4- Team Plan
5- Workspace Creation
4- Plan management (credit, number of app build, number of custom domain used, Workspace Creation, Team Plan)
5- Monthly/Yearly/Lifetime deals
6- Appsumo LTD (Creation of one time Code for LTD plans where code gives 100% discount )
7- User Management (number of users, their usages, analytics)
8- API Management (anthropic, openai or gemini)
9- SMTP management (email validation and newsletter)
10- Announcement
11- Affiliate
12- Coupons
13- Hubsopt