added Clarity Book

src/common/navigation.yaml

@@ -30,21 +30,24 @@ sections:
           - path: /values
           - path: /tokens
         sections:
+          - title: Clarity Language
+            usePageTitles: true
+            pages:
+              - path: /language-overview
+              - path: /language-types
+              - path: /language-keywords
+              - path: /language-functions
           - title: Resources
             pages:
+              - external:
+                  href: 'https://book.clarity-lang.org/'
+                  title: Clarity Book
               - external:
                   href: 'https://stacks.org/clarity-universe'
                   title: Clarity Universe
               - external:
                   href: 'https://docs.hiro.so/tutorials'
                   title: Hiro Clarity tutorials
-          - title: Clarity Language
-            usePageTitles: true
-            pages:
-              - path: /language-overview
-              - path: /language-types
-              - path: /language-keywords
-              - path: /language-functions
 
       - path: /build-apps
         pages: