docs(readme): add 'from the same studio' cross-link table

Author: v0iddo

README.md

@@ -114,6 +114,14 @@ const user = {
 
 This is one tool out of many — see [`from-the-studio.md`](from-the-studio.md) for the full lineup of vøiddo products (other CLI tools, browser extensions, the studio's flagship products and games).
 
+## From the same studio
+
+- **[@v0idd0/jsonyo](https://www.npmjs.com/package/@v0idd0/jsonyo)** — JSON swiss army knife, 18 commands, zero limits
+- **[@v0idd0/envguard](https://www.npmjs.com/package/@v0idd0/envguard)** — stop shipping `.env` drift to staging
+- **[@v0idd0/depcheck](https://www.npmjs.com/package/@v0idd0/depcheck)** — find unused dependencies in one command
+- **[@v0idd0/gitstats](https://www.npmjs.com/package/@v0idd0/gitstats)** — git repo analytics, one command
+- **[View all tools →](https://voiddo.com/tools/)**
+
 ## License
 
 MIT.