feat(image-zoom): add minimal image zoom functionality

- Introduced CSS for image zoom overlay and image styling.
- Implemented JavaScript for handling image zoom interactions, including overlay creation and close functionality.
- Updated configuration to enable image zoom feature in site parameters.
- Added partial for including image zoom assets in the layout.

layouts/_partials/scripts.html

@@ -13,3 +13,10 @@
 {{- if (.Store.Get "hasAsciinema") -}}
   {{- partial "scripts/asciinema.html" . -}}
 {{- end -}}
+
+{{/* Image zoom */}}
+{{- with site.Params.imageZoom }}
+  {{- if .enable }}
+    {{- partial "scripts/image-zoom.html" $ -}}
+  {{- end -}}
+{{- end -}}