Split projects (#1194)

* split projets into multiple categories

* split games

* bring back example

docs/projects/science.md

@@ -0,0 +1,35 @@
+# Science Projects
+
+## Physics
+
+```codecard
+[{
+  "name": "Timing Gates",
+  "url":"/projects/timing-gates",
+  "imageUrl":"/static/mb/projects/timegate.jpg"
+}]
+```
+
+## Biology
+
+```codecard
+[{
+  "name": "Soil Moisture",
+  "url":"/projects/soil-moisture",
+  "imageUrl":"/static/mb/projects/soilmoisture.jpg"
+}, {
+  "name": "Plant Watering",
+  "url":"/projects/plant-watering",
+  "imageUrl":"/static/mb/projects/plantwatering.jpg"
+}]
+```
+
+## Others
+
+```codecard
+[{
+  "name": "States of Matter",
+  "url":"/projects/states-of-matter",
+  "imageUrl":"/static/mb/projects/som.jpg"
+}]
+```