add new competition with solution (#18)

Author: morteza-rp

_data/competitions.yml

@@ -1,4 +1,20 @@
 competitions:
+  - number: '638'
+    title: 'CZII - CryoET Object Identification'
+    desc: 'Find small biological structures in large 3D volumes'
+    kind: 'Research'
+    prize: '$75,000'
+    team: '932'
+    metric: 'Mean Absolute Percentage Error'
+    link: 'https://www.kaggle.com/c/playground-series-s5e1'
+    image: '/kaggle-solutions/assets/logos/638.png'
+    year: '2025'
+    isHot: 'true'
+    done: 'true'
+    solutions: 
+      - rank: '1'
+        link: 'https://www.kaggle.com/competitions/czii-cryo-et-object-identification/discussion/561440'
+        kind: 'description'
   - number: '637'
     title: 'Playground Series - Season 5, Episode 1'
     desc: 'Forecasting Sticker Sales'