Add waldy.is-a.dev

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# Requirements
<!-- Your domain MUST pass ALL the requirements below, otherwise it WILL BE DENIED. -->
<!-- Change each checkbox to [x] (all lowercase, with no spaces between the brackets) to mark it as completed. -->
<!-- Do not modify anything in this section other than the checkboxes, or your PR will fail validation. -->

- [x] <!-- TOS --> I **agree** to the [Terms of Service](https://is-a.dev/terms). <!-- Your request MUST follow the TOS to be approved. -->
- [x] <!-- DOMAIN_STRUCTURE --> My file is following the [domain structure](https://docs.is-a.dev/domain-structure/). <!-- Your file is in the domains directory, the name is valid, it is JSON format, etc. -->
- [x] <!-- WEBSITE_REACHABLE --> My website is **reachable** and **completed**. <!-- We do not permit simple "Hello, world!" or simply copied template websites with minimal changes. -->
- [x] <!-- SOFTWARE_RELATED --> My website is **software development** related. <!-- We do not accept websites such as gaming, courses, AI agents/chatbots, etc. NOTE: Only your root subdomain needs to meet this requirement. -->
- [x] <!-- NON_COMMERCIAL --> My website is **not for commercial use**. <!-- Your website's purpose should not be to generate any form of revenue or profit. (e.g. a business) -->
- [x] <!-- CONTACT_INFO --> I have provided sufficient contact information in the `owner` key. <!-- Provide your email in the `email` field or another platform (e.g. Twitter or Discord) for contact. -->
- [x] <!-- WEBSITE_LINK --> I have provided a link to my website below. <!-- This step is required for your PR to be approved. -->

# Website Preview
<!-- Provide a LINK (not a screenshot) to your website below between the start/end markers. -->
<!-- This should be a LINK to the existing domain your website is on, NOT the is-a.dev domain you're applying for. (e.g. https://abc.vercel.app, https://abc.github.io) -->

<!-- WEBSITE_PREVIEW_START -->
https://waldy.vercel.app
<!-- WEBSITE_PREVIEW_END -->

# Website Purpose
<!-- Please tell us the purpose or motive behind your website in between the start/end markers. For example, it is a portfolio website, etc. -->

<!-- WEBSITE_PURPOSE_START -->
Personal digital, portfolio for Waldy.
<!-- WEBSITE_PURPOSE_END -->

domains/waldy.json

@@ -0,0 +1,8 @@
+{
+    "owner": {
+        "username": "waldy-ctt"
+    },
+    "records": {
+        "CNAME": "cname.vercel-dns.com"
+    }
+}