feat: Testing fixture posts

src/content/post/placeholder1.md

@@ -3,6 +3,7 @@ title: Placeholder 1
 date: '2024-09-01'
 description: "This is a placeholder description"
 tags: ["a123", "ボースト"]
+series: ["placeholder"]
 ---
 # 1st Level Heading
 

src/content/post/placeholder2.md

@@ -0,0 +1,8 @@
+---
+title: Placeholder 2
+date: '2024-09-20'
+description: "This is a placeholder description"
+tags: ["a123"]
+series: ["placeholder"]
+---
+## Content

src/content/post/placeholder3.md

@@ -0,0 +1,8 @@
+---
+title: Placeholder 3
+date: '2024-09-24'
+description: "This is a placeholder description"
+tags: []
+series: ["placeholder"]
+---
+## Content

src/content/post/the-perfect-math-class.md

@@ -0,0 +1,6 @@
+---
+title: The Perfect Math Class
+date: '2024-09-15'
+tags: ["Cirno"]
+---
+# Content