Implement support for output schemas (#411)

* tweak examples

* tweak prompt

* Implement support for output schemas

* fix: add example for structured output with zod schema

* tweak

* remove redundant cast

* fix input name

* strip $schema

* hack around vendor requirement

* clarify required result output

---------

Co-authored-by: pullfrog[bot] <226033991+pullfrog[bot]@users.noreply.github.com>

pnpm-lock.yaml

@@ -43,6 +43,9 @@ importers:
       '@toon-format/toon':
         specifier: ^1.0.0
         version: 1.4.0
+      ajv:
+        specifier: ^8.18.0
+        version: 8.18.0
       arkregex:
         specifier: 0.0.5
         version: 0.0.5
@@ -868,6 +871,9 @@ packages:
   ajv@8.17.1:
     resolution: {integrity: sha512-B/gBuNg5SiMTrPkC+A2+cW0RszwxYmn6VYxB/inlBStS5nx6xHIt/ehKRhIMhqusl7a8LjQoZnjCs5vhwxOQ1g==}
 
+  ajv@8.18.0:
+    resolution: {integrity: sha512-PlXPeEWMXMZ7sPYOHqmDyCJzcfNrUr3fGNKtezX14ykXOEIvyK81d+qydx89KY5O71FKMPaQ2vBfBFI5NHR63A==}
+
   ansi-regex@5.0.1:
     resolution: {integrity: sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==}
     engines: {node: '>=8'}
@@ -2280,6 +2286,13 @@ snapshots:
       json-schema-traverse: 1.0.0
       require-from-string: 2.0.2
 
+  ajv@8.18.0:
+    dependencies:
+      fast-deep-equal: 3.1.3
+      fast-uri: 3.1.0
+      json-schema-traverse: 1.0.0
+      require-from-string: 2.0.2
+
   ansi-regex@5.0.1: {}
 
   ansi-regex@6.2.2: {}