Add a new vis_augmenter plugin (#3107)

This PR only sets up the boilerplate code for the new plugin. The additions of the new saved object type and expression function types will be added in later PRs. Breaking it up for readability purposes.

Signed-off-by: Tyler Ohlsen <ohltyler@amazon.com>

src/plugins/vis_augmenter/README.md

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+Contains interfaces and type definitions used for allowing external plugins to augment Visualizations. Registers the relevant saved object types and expression functions.

src/plugins/vis_augmenter/opensearch_dashboards.json

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+{
+  "id": "visAugmenter",
+  "version": "opensearchDashboards",
+  "server": true,
+  "ui": true,
+  "requiredPlugins": ["data", "savedObjects", "opensearchDashboardsUtils"]
+}

src/plugins/vis_augmenter/public/index.ts

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+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { PluginInitializerContext } from 'src/core/public';
+import { VisAugmenterPlugin, VisAugmenterSetup, VisAugmenterStart } from './plugin';
+
+export function plugin(initializerContext: PluginInitializerContext) {
+  return new VisAugmenterPlugin(initializerContext);
+}
+export { VisAugmenterSetup, VisAugmenterStart };

src/plugins/vis_augmenter/public/plugin.ts

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+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { PluginInitializerContext, CoreSetup, CoreStart, Plugin } from '../../../core/public';
+import { DataPublicPluginSetup, DataPublicPluginStart } from '../../data/public';
+
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface VisAugmenterSetup {}
+
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface VisAugmenterStart {}
+
+export interface VisAugmenterSetupDeps {
+  data: DataPublicPluginSetup;
+}
+
+export interface VisAugmenterStartDeps {
+  data: DataPublicPluginStart;
+}
+
+export class VisAugmenterPlugin
+  implements
+    Plugin<VisAugmenterSetup, VisAugmenterStart, VisAugmenterSetupDeps, VisAugmenterStartDeps> {
+  constructor(initializerContext: PluginInitializerContext) {}
+
+  public setup(
+    core: CoreSetup<VisAugmenterStartDeps, VisAugmenterStart>,
+    { data }: VisAugmenterSetupDeps
+  ): VisAugmenterSetup {
+    return {};
+  }
+
+  public start(core: CoreStart, { data }: VisAugmenterStartDeps): VisAugmenterStart {
+    return {};
+  }
+
+  public stop() {}
+}

src/plugins/vis_augmenter/server/index.ts

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+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { PluginInitializerContext } from '../../../core/server';
+import { VisAugmenterPlugin } from './plugin';
+
+export function plugin(initializerContext: PluginInitializerContext) {
+  return new VisAugmenterPlugin(initializerContext);
+}
+export { VisAugmenterPluginSetup, VisAugmenterPluginStart } from './plugin';

src/plugins/vis_augmenter/server/plugin.ts

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+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import {
+  PluginInitializerContext,
+  CoreSetup,
+  CoreStart,
+  Plugin,
+  Logger,
+} from '../../../core/server';
+
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface VisAugmenterPluginSetup {}
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface VisAugmenterPluginStart {}
+
+export class VisAugmenterPlugin
+  implements Plugin<VisAugmenterPluginSetup, VisAugmenterPluginStart> {
+  private readonly logger: Logger;
+
+  constructor(initializerContext: PluginInitializerContext) {
+    this.logger = initializerContext.logger.get();
+  }
+
+  public setup(core: CoreSetup) {
+    this.logger.debug('VisAugmenter: Setup');
+    return {};
+  }
+
+  public start(core: CoreStart) {
+    this.logger.debug('VisAugmenter: Started');
+    return {};
+  }
+
+  public stop() {}
+}