feat: Second starter case - The Broken Vase

- Case: easy-02-the-broken-vase
- Plot: Antique vase shattered, roommate vs visitor
- Evidence: Broken vase photo + text messages
- Suspects: Sam Chen + Alex Kim
- Placeholder images for testing
- truth.enc: base64 encoded

Now we have 2 easy cases to choose from.

cases/easy-02-the-broken-vase/case.yaml

@@ -0,0 +1,40 @@
+title: "The Broken Vase"
+
+briefing:
+  narrative: |
+    You left your apartment at 1:00 PM for a quick errand.
+    You returned at 2:00 PM to find your grandmother's antique vase 
+    shattered on the living room floor.
+
+    Two people were in your apartment while you were gone:
+    your roommate and a visitor.
+
+    Figure out what happened.
+
+evidence:
+  - id: "evidence-01"
+    name: "Broken Vase Photo"
+    image: "images/evidence-01.jpg"
+    description: "Photo of the shattered vase on the floor"
+
+  - id: "evidence-02"
+    name: "Text Messages"
+    image: "images/evidence-02.jpg"
+    description: "Text messages from one of the suspects"
+
+suspects:
+  - id: "suspect-01"
+    name: "Sam Chen"
+    photo: "images/suspect-01.jpg"
+    description: |
+      Your roommate. Was home when you left.
+      Said they were studying in their room.
+      You saw them on the couch when you left.
+
+  - id: "suspect-02"
+    name: "Alex Kim"
+    photo: "images/suspect-02.jpg"
+    description: |
+      Your friend. Came over briefly for a study session.
+      Arrived just after you left.
+      You texted Sam to let them in.

cases/easy-02-the-broken-vase/truth.enc

@@ -0,0 +1 @@
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