Cherrypick extensions changes to v0.6.0 (#9179)

Co-authored-by: hritan <48129645+hritan@users.noreply.github.com>
Co-authored-by: Taneja Hriday <hridayt@google.com>
Co-authored-by: shishu314 <shishu_1998@yahoo.com>
Co-authored-by: Shi Shu <shii@google.com>
Co-authored-by: Jacob MacDonald <jakemac@google.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/cli/src/test-utils/mockCommandContext.ts

@@ -54,6 +54,8 @@ export const createMockCommandContext = (
       loadHistory: vi.fn(),
       toggleCorgiMode: vi.fn(),
       toggleVimEnabled: vi.fn(),
+      extensionsUpdateState: new Map(),
+      setExtensionsUpdateState: vi.fn(),
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
     } as any,
     session: {