Missing manual DNS verification option for custom domains Squarespace hosting

### 👟 Reproduction steps Steps to Reproduce: Go to Appwrite Console → Settings → Domains Click on “Add Domain” and enter a valid domain (e.g. fumes.app) Scroll down to the Verification section See that only nameserver-based verification is available — there’s no manual DNS record (TXT/CNAME) verification option ### 👍 Expected behavior There should be an alternative manual DNS verification method (TXT or CNAME) for users who cannot change nameservers (e.g. Squarespace, Shopify, or managed DNS users). ### 👎 Actual Behavior Verification fails with “Verification failed” since some registrars do not allow changing nameservers without transferring the domain. ### 🎲 Appwrite version Appwrite Cloud ### 💻 Operating system MacOS ### 🧱 Your Environment Users with hosted DNS providers like Squarespace are completely blocked from connecting their domains to Appwrite. ### 👀 Have you spent some time to check if this issue has been raised before? - [x] I checked and didn't find similar issue ### 🏢 Have you read the Code of Conduct? - [x] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)