docs(archetypes): update markdown syntax and remove uncommon front matter in templates (#676)

archetypes/posts.md

@@ -11,7 +11,6 @@ author:
   avatar:
 description:
 keywords:
-license:
 comment: false
 weight: 0
 tags:
@@ -23,18 +22,12 @@ hiddenFromSearch: false
 hiddenFromRelated: false
 hiddenFromFeed: false
 summary:
-resources:
-  - name: featured-image
-    src: featured-image.jpg
-  - name: featured-image-preview
-    src: featured-image-preview.jpg
-toc: true
-math: false
-lightgallery: false
+featuredImagePreview:
+featuredImage:
 password:
 message:
 repost:
-  enable: true
+  enable: false
   url:
 
 # See details front matter: https://fixit.lruihao.cn/documentation/content-management/introduction/#front-matter