feat: add front-matter variable category

src/content/config.ts

@@ -7,6 +7,7 @@ const blogCollection = defineCollection({
         description: z.string().optional(),
         image: z.string().optional(),
         tags: z.array(z.string()).optional(),
+        category: z.string().optional(),
     })
 })
 export const collections = {

src/content/posts/cover.md

@@ -4,6 +4,7 @@ published: 2023-09-01
 description: 'How to set a cover image using the cover attribute.'
 image: 'https://image.civitai.com/xG1nkqKTMzGDvpLrqFT7WA/208fc754-890d-4adb-9753-2c963332675d/width=2048/01651-1456859105-(colour_1.5),girl,_Blue,yellow,green,cyan,purple,red,pink,_best,8k,UHD,masterpiece,male%20focus,%201boy,gloves,%20ponytail,%20long%20hair,.jpeg'
 tags: ["Fuwari", "Blogging", "Customization"]
+category: 
 ---
 
 ## Set the cover image using the `image` attribute

src/content/posts/markdown.md

@@ -4,7 +4,7 @@ published: 2023-10-01
 description: A simple example of a Markdown blog post.
 image:
 tags: [Markdown, Blogging, Demo]
-categories: [Example]
+category: Example
 ---
 
 An h1 header

src/content/posts/video.md

@@ -4,7 +4,7 @@ published: 2022-08-01
 description: This post demonstrates how to include embedded video in a blog post.
 image:
 tags: [Example, Video]
-categories: []
+category: Example
 ---
 Just copy the embed code from YouTube or other platforms, and paste it in the markdown file.