ci: support books without mdbook-trunk

Author: DanielleHuisman

.github/workflows/book.yml

@@ -2,6 +2,12 @@ name: Book
 
 on:
     workflow_call:
+        inputs:
+            combine:
+                description: Combine book outputs.
+                type: boolean
+                required: false
+                default: true
 
 permissions:
     contents: read
@@ -60,9 +66,15 @@ jobs:
               working-directory: book
 
             - name: Combine Book Outputs
+              if: ${{ inputs.combine == 'true' }}
               run: mdbook-trunk combine
               working-directory: book
 
+            - name: Copy Book Output
+              if: ${{ inputs.combine == 'false' }})
+              run: rm -rf dist && cp -r book dist
+              working-directory: book
+
             - name: Upload artifact
               uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
               with: