Support rendering VisLayers in vega charts

Signed-off-by: Tyler Ohlsen <[email protected]>

src/plugins/vis_augmenter/README.md

@@ -1 +1 @@
-Contains interfaces and type definitions used for allowing external plugins to augment Visualizations. Registers the relevant saved object types and expression functions.
+Contains interfaces, type definitions, helper functions, and services used for allowing external plugins to augment Visualizations. Registers the relevant saved object types and expression functions.

src/plugins/vis_augmenter/opensearch_dashboards.json

@@ -3,5 +3,11 @@
   "version": "opensearchDashboards",
   "server": true,
   "ui": true,
-  "requiredPlugins": ["data", "savedObjects", "opensearchDashboardsUtils", "expressions"]
+  "requiredPlugins": [
+    "data",
+    "savedObjects",
+    "opensearchDashboardsUtils",
+    "expressions",
+    "visTypeVega"
+  ]
 }

src/plugins/vis_augmenter/public/constants.ts

@@ -0,0 +1,7 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export const VIS_LAYER_COLUMN_TYPE = 'vis_layer';
+export const EVENT_COLOR = 'red';

src/plugins/vis_augmenter/public/index.ts

@@ -25,7 +25,13 @@ export {
   VisLayerFunctionDefinition,
   VisLayer,
   VisLayers,
+  VisLayerTypes,
+  PointInTimeEvent,
+  PointInTimeEventsVisLayer,
+  isPointInTimeEventsVisLayer,
 } from './types';
 
 export * from './expressions';
 export * from './utils';
+export * from './constants';
+export * from './vega';