Generate YAML versions of these schema documents (#2669)

generated via:
perl -MYAML::XS -MJSON::MaybeXS -we'$YAML::XS::Boolean="JSON::PP"; print Dump(JSON::MaybeXS->new->decode(do { local $/; <> }))' input.json > output.yaml

schemas/v3.1/dialect/base.schema.yaml

@@ -0,0 +1,17 @@
+---
+$dynamicAnchor: meta
+$id: https://spec.openapis.org/oas/3.1/dialect/base
+$schema: https://json-schema.org/draft/2020-12/schema
+$vocabulary:
+  https://json-schema.org/draft/2020-12/vocab/applicator: true
+  https://json-schema.org/draft/2020-12/vocab/content: true
+  https://json-schema.org/draft/2020-12/vocab/core: true
+  https://json-schema.org/draft/2020-12/vocab/format-annotation: true
+  https://json-schema.org/draft/2020-12/vocab/meta-data: true
+  https://json-schema.org/draft/2020-12/vocab/unevaluated: true
+  https://json-schema.org/draft/2020-12/vocab/validation: true
+  https://spec.openapis.org/oas/3.1/vocab/base: false
+allOf:
+- $ref: https://json-schema.org/draft/2020-12/schema
+- $ref: https://spec.openapis.org/oas/3.1/meta/base
+title: OpenAPI 3.1 Schema Object Dialect

schemas/v3.1/meta/base.schema.yaml

@@ -0,0 +1,63 @@
+---
+$defs:
+  discriminator:
+    $ref: '#/$defs/extensible'
+    properties:
+      mapping:
+        additionalProperties:
+          type: string
+        type: object
+      propertyName:
+        type: string
+    required:
+    - propertyName
+    type: object
+    unevaluatedProperties: false
+  extensible:
+    patternProperties:
+      ^x-: true
+  external-docs:
+    $ref: '#/$defs/extensible'
+    properties:
+      description:
+        type: string
+      url:
+        format: uri-reference
+        type: string
+    required:
+    - url
+    type: object
+    unevaluatedProperties: false
+  xml:
+    $ref: '#/$defs/extensible'
+    properties:
+      attribute:
+        type: boolean
+      name:
+        type: string
+      namespace:
+        format: uri
+        type: string
+      prefix:
+        type: string
+      wrapped:
+        type: boolean
+    type: object
+    unevaluatedProperties: false
+$dynamicAnchor: meta
+$id: https://spec.openapis.org/oas/3.1/meta/base
+$schema: https://json-schema.org/draft/2020-12/schema
+$vocabulary:
+  https://spec.openapis.org/oas/3.1/vocab/base: true
+properties:
+  discriminator:
+    $ref: '#/$defs/discriminator'
+  example: true
+  externalDocs:
+    $ref: '#/$defs/external-docs'
+  xml:
+    $ref: '#/$defs/xml'
+title: OAS Base vocabulary
+type:
+- object
+- boolean