Add vitepress docs

docs/dvm/index.md

@@ -0,0 +1,18 @@
+# @welshman/dvm
+
+`@welshman/dvm` is a comprehensive package for building and interacting with Data Vending Machines (DVMs) in the Nostr ecosystem. It provides both server-side DVM implementation capabilities and client-side request handling.
+
+## What is a DVM?
+
+A Data Vending Machine (DVM) is a Nostr service that:
+- Listens for specific kinds of events
+- Processes these events according to defined rules
+- Responds with new events containing processed data
+- Optionally provides progress updates during processing
+
+
+## Installation
+
+```bash
+npm install @welshman/dvm
+```