Added Acheivements

[f3-jolt]

Summary

• Adds an AchievementsCard to region pages showing PAX approaching post/Q milestones and upcoming FNG anniversaries within 14 days
• Adds RegionAchievementPax type and a BigQuery CTE pipeline in getPageData that computes next milestones (25/50/100/200/.../1000) for both region and nation scope, and anniversary dates using leap-year-safe DATE_ADD logic
• Wires the new data through the region loader, page, and RegionalPageWrapper; layout rearranged so Achievements sits beside the Kotters + Upcoming column

What changed

• src/lib/types.ts — new RegionAchievementPax interface; RegionData extended with achievements
• src/lib/bq/regions.ts — new achievement_* CTEs appended to getPageData; achievements column added to SELECT and return value
• src/components/region/AchievementsCard.tsx — new client component with Region/Nation scope toggle and All/Posts/Qs/Anniversaries filter; sorted by urgency (days/count remaining)
• src/components/region/PageWrapper.tsx — imports and renders AchievementsCard; Kotters + Upcoming events stacked in a nested column alongside it
• src/app/stats/region/[regionId]/loader.ts and page.tsx — pass achievements through the data pipeline

Test plan

• Visit a region page and confirm the Achievements card renders with real data
• Toggle Region ↔ Nation scope and verify counts/milestones change accordingly
• Filter by Posts / Qs / Anniversaries and confirm the list filters correctly
• Verify PAX with an anniversary in the next 14 days appear with correct year label and days-until count
• Confirm PAX with fewer than 25 region posts or 10 total posts are excluded
• Check that the Kotters and Upcoming Events cards are still visible and correctly stacked

[F3-Skippy]