Stabilize active terminal APIs

Fixes #58357

src/vs/vscode.d.ts

@@ -5920,6 +5920,19 @@ declare module 'vscode' {
 		 */
 		export const terminals: ReadonlyArray<Terminal>;
 
+		/**
+		 * The currently active terminal or `undefined`. The active terminal is the one that
+		 * currently has focus or most recently had focus.
+		 */
+		export const activeTerminal: Terminal | undefined;
+
+		/**
+		 * An [event](#Event) which fires when the [active terminal](#window.activeTerminal)
+		 * has changed. *Note* that the event also fires when the active terminal changes
+		 * to `undefined`.
+		 */
+		export const onDidChangeActiveTerminal: Event<Terminal | undefined>;
+
 		/**
 		 * An [event](#Event) which fires when a terminal has been created, either through the
 		 * [createTerminal](#window.createTerminal) API or commands.

src/vs/vscode.proposed.d.ts

@@ -995,19 +995,6 @@ declare module 'vscode' {
 	}
 
 	export namespace window {
-		/**
-		 * The currently active terminal or `undefined`. The active terminal is the one that
-		 * currently has focus or most recently had focus.
-		 */
-		export const activeTerminal: Terminal | undefined;
-
-		/**
-		 * An [event](#Event) which fires when the [active terminal](#window.activeTerminal)
-		 * has changed. *Note* that the event also fires when the active terminal changes
-		 * to `undefined`.
-		 */
-		export const onDidChangeActiveTerminal: Event<Terminal | undefined>;
-
 		/**
 		 * Create a [TerminalRenderer](#TerminalRenderer).
 		 *

src/vs/workbench/api/node/extHost.api.impl.ts

@@ -354,7 +354,7 @@ export function createApiFactory(
 				return extHostEditors.getVisibleTextEditors();
 			},
 			get activeTerminal() {
-				return proposedApiFunction(extension, extHostTerminalService.activeTerminal);
+				return extHostTerminalService.activeTerminal;
 			},
 			get terminals() {
 				return extHostTerminalService.terminals;
@@ -397,9 +397,9 @@ export function createApiFactory(
 			onDidOpenTerminal(listener, thisArg?, disposables?) {
 				return extHostTerminalService.onDidOpenTerminal(listener, thisArg, disposables);
 			},
-			onDidChangeActiveTerminal: proposedApiFunction(extension, (listener, thisArg?, disposables?) => {
+			onDidChangeActiveTerminal(listener, thisArg?, disposables?) {
 				return extHostTerminalService.onDidChangeActiveTerminal(listener, thisArg, disposables);
-			}),
+			},
 			get state() {
 				return extHostWindow.state;
 			},