Switch homepage review stat from Facebook to Google

- Replace inc/facebook-stats.php with inc/google-reviews.php: fetches
  average star rating + review count from the Places API (New) instead
  of Facebook's Graph API, same cache-to-JSON/fallback-on-failure shape
  as before.
- index.php: stat card now shows the native star rating ("4.8★ average
  rating") instead of a recommend %, sourced from Google. Drops the
  Facebook-followers line entirely — Google's API has no equivalent and
  showing a stale/static number wasn't worth keeping. "Follow on
  Facebook" links elsewhere on the site are untouched.
- config.example.php: swap FB_PAGE_ID/FB_PAGE_ACCESS_TOKEN/
  FB_STATS_CACHE_TTL/FB_FALLBACK_* for GOOGLE_PLACE_ID/
  GOOGLE_PLACES_API_KEY/GOOGLE_STATS_CACHE_TTL/GOOGLE_FALLBACK_RATING/
  GOOGLE_FALLBACK_REVIEW_COUNT (set to the pub's actual 4.8★/71 reviews),
  with setup instructions in comments. config.php (gitignored) updated
  to match.
- Remove the now-dead .stat-row CSS that only existed for the dropped
  followers line; rebuild styles.css.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

index.php

@@ -1,9 +1,9 @@
 <?php
 require __DIR__ . '/config.php';
-require __DIR__ . '/inc/facebook-stats.php';
+require __DIR__ . '/inc/google-reviews.php';
 require __DIR__ . '/inc/announcements.php';
 require __DIR__ . '/inc/hours.php';
-$fbStats = fritz_facebook_stats();
+$googleReviews = fritz_google_reviews();
 $activeAnnouncements = get_active_announcements();
 $hoursByDay = get_all_hours();
 $siteUrl = rtrim(SITE_URL, '/');
@@ -125,14 +125,9 @@ $siteUrl = rtrim(SITE_URL, '/');
           </div>
           <div class="stat-card reveal">
             <span class="eyebrow">As the Regulars See It</span>
-            <div class="stat-big"><?= (int) $fbStats['recommend_pct'] ?>%</div>
-            <p class="stat-label">recommend The Old Fitz</p>
-            <p class="stat-source">Source: Facebook reviews (<?= (int) $fbStats['review_count'] ?>)</p>
-            <div class="stat-row">
-              <div class="stat-big"><?= number_format((int) $fbStats['followers']) ?>+</div>
-              <p class="stat-label">people following along on Facebook</p>
-              <p class="stat-source">Source: Facebook followers</p>
-            </div>
+            <div class="stat-big"><?= number_format((float) $googleReviews['rating'], 1) ?>★</div>
+            <p class="stat-label">average rating</p>
+            <p class="stat-source">Source: Google reviews (<?= (int) $googleReviews['review_count'] ?>)</p>
           </div>
         </div>
       </div>