Swagger 2.0 high level model going in now

Shifting a few high level models around that are also shared. now it's just a churn game to flesh the high level model and test it up.

document.go

@@ -0,0 +1,28 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package main
+
+import (
+	"github.com/pb33f/libopenapi/datamodel"
+	v2high "github.com/pb33f/libopenapi/datamodel/high/2.0"
+	v3high "github.com/pb33f/libopenapi/datamodel/high/3.0"
+)
+
+type Document[T any] struct {
+	version string
+	info    *datamodel.SpecInfo
+	Model   T
+}
+
+func (d *Document[T]) GetVersion() string {
+	return d.version
+}
+
+func (d *Document[T]) BuildV2Document() (*v2high.Swagger, error) {
+	return nil, nil
+}
+
+func (d *Document[T]) BuildV3Document() (*v3high.Document, error) {
+	return nil, nil
+}