refactor: clean up configuration and components, optimize implementation details

- Remove unused navigation bar and social link configurations
- Update Footer component, simplify code
- Refactor PostList and PostTime components, improve code readability
- Adjust Waline comment component styles
- Streamline content config and reading time plugin
- Update theme guide document titles and tags

src/plugins/remark-reading-time.js

@@ -1,4 +1,3 @@
-// biome-ignore lint/suspicious/noShadowRestrictedNames: <explanation>
 import { toString } from 'mdast-util-to-string'
 import getReadingTime from 'reading-time'
 
@@ -10,6 +9,5 @@ export function remarkReadingTime() {
       1,
       Math.round(readingTime.minutes),
     )
-    data.astro.frontmatter.words = readingTime.words
   }
 }