docs: add shorn to the ecosystem page

ark/docs/content/docs/ecosystem/index.mdx

@@ -69,3 +69,28 @@ export default defineConfig({
 ```
 
 > For more details, see the [Getting Started guide](https://use-drzl.github.io/drzl/guide/getting-started.html).
+
+### shorn
+
+[shorn](https://shorn.dev) turns an ArkType type into compact binary serialization. Field names and type tags stay out of the payload because the type already provides them, so there is no schema language to learn and nothing to generate.
+
+ArkType 2.1.28 and newer implements both [Standard Schema](https://standardschema.dev/schema) and [Standard JSON Schema](https://standardschema.dev/json-schema), so a type can be passed straight to `encode`. Validation runs on encode and again on decode.
+
+```ts
+// @noErrors
+import { type } from "arktype"
+import { decode, encode } from "@chichurita/shorn"
+
+const Person = type({
+	name: "string",
+	age: "number.integer >= 0",
+	sex: "'M' | 'F' | 'X'"
+})
+
+const bytes = encode(Person, { name: "Grace", age: 45, sex: "F" })
+bytes.length // 8, where the same record is 35 bytes of minified JSON
+
+decode(Person, bytes) // typed and validated
+```
+
+> ArkType objects are open by default, so shorn rejects undeclared properties during encoding rather than dropping data. Use `"+": "delete"` to strip expected extras. See the [ArkType guide](https://shorn.dev/validators/arktype/) for the details.

ark/docs/content/docs/ecosystem/meta.json

@@ -1,5 +1,5 @@
 {
 	"title": "Ecosystem",
 	"icon": "New",
-	"pages": ["[ArkEnv](/docs/ecosystem#arkenv)", "[DRZL](/docs/ecosystem#drzl)"]
+	"pages": ["[ArkEnv](/docs/ecosystem#arkenv)", "[DRZL](/docs/ecosystem#drzl)", "[shorn](/docs/ecosystem#shorn)"]
 }