Adds help center URL fallback for disabled walkthroughs

[d13]

This brings back all the disabled Walkthrough actions for Cursor. Instead of trying to open the walkthrough, it will instead open a Help Center page.

[Copilot]

Pull Request Overview

This PR adds help center URL fallback functionality for disabled walkthroughs in Cursor. Instead of trying to open the walkthrough when it's not supported (specifically in Cursor), the system will redirect users to relevant Help Center pages.

Key changes include:

• Refactoring walkthrough-related code to always instantiate the walkthrough service regardless of support status
• Adding fallback URL mappings and telemetry tracking for when help center URLs are used instead of walkthroughs
• Moving walkthrough context keys to a shared constants file for better organization

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/webviews/home/protocol.ts	Adds walkthrough state tracking to the home webview protocol
src/webviews/home/homeWebview.ts	Refactors walkthrough progress handling to always provide state data
src/webviews/apps/home/components/onboarding.ts	Enhances onboarding component with detailed walkthrough progress display
src/telemetry/walkthroughStateProvider.ts	Moves type definitions and adds state getter method
src/plus/launchpad/launchpadIndicator.ts	Removes conditional walkthrough support checks
src/plus/launchpad/launchpad.ts	Removes conditional walkthrough support checks
src/plus/gk/subscriptionService.ts	Removes conditional walkthrough support checks
src/container.ts	Always instantiates walkthrough service
src/constants.walkthroughs.ts	New file defining walkthrough context keys and progress steps
src/constants.ts	Adds help center URLs for walkthrough fallbacks
src/constants.telemetry.ts	Moves walkthrough context keys import and adds fallback URL tracking
src/constants.context.ts	Updates walkthrough context keys import
src/commands/walkthroughs.ts	Implements help center URL fallback logic with telemetry
src/commands/quickCommand.steps.ts	Removes conditional walkthrough support check
docs/telemetry-events.md	Documents new telemetry property for fallback URL usage