feat(vscode): add support for "workbench.extensions.installExtension"…

… command

packages/plugin-ext-vscode/src/browser/plugin-vscode-commands-contribution.ts

@@ -53,6 +53,7 @@ import { DiffService } from '@theia/workspace/lib/browser/diff-service';
 import { inject, injectable } from 'inversify';
 import { Position } from '@theia/plugin-ext/lib/common/plugin-api-rpc';
 import { URI } from 'vscode-uri';
+import { PluginServer } from '@theia/plugin-ext/lib/common/plugin-protocol';
 import { MonacoEditor } from '@theia/monaco/lib/browser/monaco-editor';
 import { TerminalFrontendContribution } from '@theia/terminal/lib/browser/terminal-frontend-contribution';
 import { QuickOpenWorkspace } from '@theia/workspace/lib/browser/quick-open-workspace';
@@ -106,6 +107,8 @@ export class PluginVscodeCommandsContribution implements CommandContribution {
     protected readonly terminalService: TerminalService;
     @inject(CodeEditorWidgetUtil)
     protected readonly codeEditorWidgetUtil: CodeEditorWidgetUtil;
+    @inject(PluginServer)
+    protected readonly pluginServer: PluginServer;
 
     registerCommands(commands: CommandRegistry): void {
         commands.registerCommand(VscodeCommands.OPEN, {
@@ -208,6 +211,9 @@ export class PluginVscodeCommandsContribution implements CommandContribution {
         commands.registerCommand({ id: 'workbench.action.openSettings' }, {
             execute: () => commands.executeCommand(CommonCommands.OPEN_PREFERENCES.id)
         });
+        commands.registerCommand({ id: 'workbench.extensions.installExtension' }, {
+            execute: (id: string) => this.pluginServer.deploy(id)
+        });
         commands.registerCommand({ id: 'workbench.action.files.save', }, {
             execute: (uri?: monaco.Uri) => {
                 if (uri) {