add readme

README.md

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+# Debilus
+
+Easy to setup typed relational Wrapper atop deno KV.
+
+## Usage
+
+```ts
+import { EntryFor, Schema, Store } from "https://git.barnulf.net/mb/debilus/raw/commit/fc701bec680dd73be29c72164f47ee87fac540c7/mod.ts"
+const store = await Store.open(
+    new Schema({
+        user: { name: "string" },
+        post: { author: ["one", "user"] }
+    }),
+    "./store.kv"
+);
+type User = EntryFor<typeof store, "user">;
+const bob: User = await store.insert("user", { name: "bob" });
+```