fix(docs): resolve NaturalDocs custom style not found in CI

NaturalDocs only searches its installation Styles folder, not the
project config folder. Copy custom styles into the installation
directory and add the required Format header to Style.txt.

Author: fank

.github/workflows/docs.yml

@@ -34,6 +34,9 @@ jobs:
           unzip -q nd.zip -d naturaldocs
           chmod +x "naturaldocs/Natural Docs/NaturalDocs"
 
+      - name: Install custom styles
+        run: cp -r NaturalDocs.Project/Styles/* "naturaldocs/Natural Docs/Styles/"
+
       - name: Generate documentation
         run: |
           mkdir -p docs-output

NaturalDocs.Project/Styles/OCAP2/Style.txt

@@ -1,3 +1,5 @@
+Format: 2.4 (Development Release 2)
+
 Inherit: Default
 
 Frame OnLoad: NDThemes.SetAvailableThemes([["Dark","Dark"],["Light","Light"],["Auto","Auto:Light/Dark"],["Black","Black"]])