chore: refactor read scheme to openapi from kubernetes api definition

Previously, only a single embedded Kubernetes API version could be specified, resulting in a lack of support for certain GVKs.
To address this, the goal is to create and utilize a unified scheme that consolidates Kubernetes API definitions.
As a preliminary step, the current method of loading API definitions will be improved.

kyaml/openapi/kustomizationapi/swagger_test.go

@@ -0,0 +1,45 @@
+// Copyright 2026 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kustomizationapi
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"runtime"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestAssetCompatibility(t *testing.T) {
+	b, err := Asset(assetName)
+	require.NoError(t, err)
+	if runtime.GOOS != "windows" {
+		digest := sha256.Sum256(b)
+		require.Equal(t, "65c5ffdbaa33a1a6db954c0e9524d5ae3ec5ef5af9d2ca17da0577868d887531",
+			hex.EncodeToString(digest[:]))
+	}
+	info, err := AssetInfo(assetName)
+	require.NoError(t, err)
+	require.Equal(t, int64(len(b)), info.Size())
+	require.Equal(t, "swagger.json", info.Name())
+
+	_, err = Asset("kustomizationapi\\swagger.json")
+	require.NoError(t, err)
+	children, err := AssetDir("kustomizationapi")
+	require.NoError(t, err)
+	require.Equal(t, []string{"swagger.json"}, children)
+	_, err = AssetDir(assetName)
+	require.Error(t, err)
+
+	b[0] ^= 0xff
+	again := MustAsset(assetName)
+	require.NotEqual(t, b[0], again[0], "Asset must return a fresh byte slice")
+	_, err = Asset("missing")
+	require.Error(t, err)
+}
+
+func TestAssetNames(t *testing.T) {
+	require.Equal(t, []string{assetName}, AssetNames())
+}