fix: add missing Timeline components to repository

The Timeline.astro and TimelineItem.astro components were being used
in the Statsbomb case study but weren't tracked by git, causing CI
build failures. These components are essential for the project
timeline section.

Author: saadshahd

src/components/Timeline.astro

@@ -0,0 +1,8 @@
+---
+// Timeline wrapper component for displaying chronological milestones
+// Usage: Wrap TimelineItem components with this container
+---
+
+<div class="my-8">
+  <slot />
+</div>

src/components/TimelineItem.astro

@@ -0,0 +1,32 @@
+---
+interface Props {
+  date: string;
+  title: string;
+  description: string;
+  isLast?: boolean;
+}
+
+const { date, title, description, isLast = false } = Astro.props;
+---
+
+<div class="relative flex gap-4">
+  <!-- Timeline dot and line -->
+  <div class="flex flex-col items-center">
+    <div
+      class="w-3 h-3 rounded-full border-2 border-text bg-cream flex-shrink-0 mt-1.5"
+    >
+    </div>
+    {
+      !isLast && (
+        <div class="w-0.5 flex-grow bg-text-light min-h-[2rem] mt-1" />
+      )
+    }
+  </div>
+
+  <!-- Content -->
+  <div class="flex-1 pb-4">
+    <p class="text-sm font-semibold text-text-light mb-1">{date}</p>
+    <h3 class="text-base font-semibold text-text mb-1">{title}</h3>
+    <p class="text-sm text-text-light leading-relaxed">{description}</p>
+  </div>
+</div>