refactor: 改用 TypeScript。close #1.

types/AuthorFrontMatter.ts

@@ -0,0 +1,11 @@
+export type AuthorFrontMatter = {
+  layout?: string
+  name: string
+  avatar: string
+  occupation: string
+  company: string
+  email: string
+  twitter: string
+  linkedin: string
+  github: string
+}

types/PostFrontMatter.ts

@@ -0,0 +1,14 @@
+export type PostFrontMatter = {
+  title: string
+  date: string
+  tags: string[]
+  lastmod?: string
+  draft?: boolean
+  summary?: string
+  images?: string[]
+  authors?: string[]
+  layout?: string
+  canonicalUrl?: string
+  slug: string
+  fileName: string
+}

types/Toc.ts

@@ -0,0 +1,5 @@
+export type Toc = {
+  value: string
+  depth: number
+  url: string
+}[]