Add new featured challenges and showcases (#1711)

Author: kfahn22

content/pages/homepage/index.json

@@ -32,11 +32,11 @@
     "description": "Watch Dan take on Coding Challenges in p5.js and Processing. The challenge topics include algorithmic art, machine learning, simulation, generative poetry, and more.",
     "featured": [
       "185-dragon-curve",
-      "175-3D-cube-applesoft-basic",
-      "160-spring-forces",
-      "113-4d-hypercube-aka-tesseract",
-      "99-neural-network-color-predictor",
-      "85-the-game-of-life"
+      "36-blobby",
+      "46-asteroids",
+      "53-random-walker-with-vectors-and-levy-flight",
+      "67-pong",
+      "77-recursion"
     ],
     "challengesCta": {
       "text": "ready to explore? try a challenge!",
@@ -47,14 +47,14 @@
   "passengerShowcase": {
     "title": "Passenger showcase highlights",
     "featured": [
-      "challenges/184-elastic-collisions/showcase/contribution-1720963615.json",
-      "challenges/184-elastic-collisions/showcase/contribution-1720958474.json",
-      "noc/4-particles/4-particle-textures/showcase/contribution-1721161051.json",
-      "physics-libraries/box2d/12-collision-events/showcase/contribution-1722000424.json",
-      "challenges/14-fractal-trees-recursive/showcase/contribution-1723666252.json",
-      "challenges/10-dfs-maze-generator/showcase/contribution-1720952091.json",
-      "challenges/184-elastic-collisions/showcase/contribution-1721016798.json",
-      "challenges/100-neuroevolution-flappy-bird/showcase/contribution-1720945862.json"
+      "code/7-arrays/5-removing-elements/showcase/contribution-1724448350.json",
+      "challenges/185-dragon-curve/showcase/contribution-1724142201.json",
+      "challenges/185-dragon-curve/showcase/contribution-1724059990.json",
+      "challenges/185-dragon-curve/showcase/contribution-1724115513.json",
+      "challenges/184-elastic-collisions/showcase/contribution-1723892814.json",
+      "challenges/185-dragon-curve/showcase/contribution-1724172518.json",
+      "challenges/24-perlin-noise-flow-field/showcase/contribution-1725204487.json",
+      "code/2-variables/4-random/showcase/contribution-1725221639.json"
     ],
     "showcaseCta": {
       "text": "Want to see more?",