Add guided tour system for hosting partner installations

[ilicfilip]

Summary

• Adds a guided tour system using driver.js for hosting partner onboarding
• Tours can span multiple contexts: frontend, block editor, and admin pages
• Includes "go-to-publish" tour that guides users through editing their homepage (heading, paragraph, image, save)
• State persisted in user meta, survives page reloads

Playground / Admin Bar Testing

1. Create new Page (add paragraph of text and an image) and set it as a Home page
2. Visit the site's homepage (not wp-admin)
3. Click "Start Guided Tour" in the admin bar
4. Follow the tour: Edit Page link → heading → paragraph → image → Save button
5. To test again, click "Reset Tour" in the admin bar

Testing while locally developing

1. Add this filter to enable the tour: add_filter( 'progress_planner_is_hosting_install', '__return_true' );
2. Visit the site's homepage (not wp-admin) while logged in as admin
3. A welcome card appears in the bottom-right corner - click it to start the tour
4. Follow the tour: Edit Page link → heading → paragraph → image → Save button
5. To reset and test again: delete_user_meta( get_current_user_id(), 'pp_guided_tour_state' );

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Test on Playground
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✅ Code Coverage Report

Metric	Value
Total Coverage	31.60% 📉
Base Coverage	31.60%
Difference	📈 0.00%

⚠️ Coverage below recommended 40% threshold

🎉 Great job maintaining/improving code coverage!

📊 File-level Coverage Changes (1 files)

📉 Coverage Decreased

Class	Before	After	Change
Progress_Planner\Base	44.51%	44.31%	-0.20%

ℹ️ About this report

• All tests run in a single job with Xdebug coverage
• Security tests excluded from coverage to prevent output issues
• Coverage calculated from line coverage percentages