Data explorer/context menu initial (#6264)

* fixed context for data explorer

* added more files

* initial servers and database context menu actions finished

* added all actions for servers and databases with correct conditions

* added nodetype and nodelabel for subtype actions

* added nodeinfo logic to oe shim

* fixed context for cms

* added all scripting actions to data explorer

* review comments

* fix import

* fix correct context key

* removed unused import

* separate PR for commands and menus added

* rename mssql context menu nodes

* remove command id constants

src/sql/azdata.proposed.d.ts

@@ -2632,9 +2632,15 @@ declare module 'azdata' {
 		serverInfo: ServerInfo;
 	}
 
+	export enum ExtensionNodeType {
+		Server = 'Server',
+		Database = 'Database'
+	}
+
 	export class TreeItem extends vscode.TreeItem {
 		payload?: IConnectionProfile;
 		childProvider?: string;
+		type?: ExtensionNodeType;
 	}
 
 	export namespace tasks {