added upcoming achievements to region

[f3-jolt]

👋 TL;DR

Adds an Upcoming Achievements card to the region page, surfacing PAX who are approaching post/Q milestones or have an FNG anniversary within the next 14 days.

🔎 Details

New AchievementsCard component powered by a new BigQuery CTE in getPageData. The card shows region-level PAX approaching post milestones (within 5) or Q milestones (within 3), as well as FNG anniversaries in the next 14 days. Users can toggle between Region and Nation scope and filter by achievement type (All / Posts / Qs / Anniversaries) via a dropdown. Rows are sorted by urgency — anniversaries first by days remaining, then milestones by count remaining.

Data plumbing runs through a new RegionAchievementPax type in types.ts, a new achievements CTE in regions.ts, and updated props in loader.ts, page.tsx, and PageWrapper.tsx.

✅ How to Test

• Region page loads without error when achievements data is present
• Region page loads without error when achievements is null or empty
• Region/Nation scope toggle correctly switches post and Q counts
• All/Posts/Qs/Anniversaries dropdown filters the list correctly
• Anniversary rows show the correct year label and days-until string
• PAX with no approaching milestone and no upcoming anniversary do not appear
• Layout renders correctly on mobile (single column) and desktop (2-column, Kotter + Upcoming Events stacked right)

🥜 GIF