feat: support load notebook from assets and remote

- update docs accordingly
- add example notebook file

layouts/shortcodes/jupyter.html

@@ -3,13 +3,28 @@
 {{- $data := "" -}}
 {{- $page := .Page -}}
 
+{{- $isLocal := not (urls.Parse $path).Scheme -}}
+{{- $isPage := and (eq .Page.Kind "page") (not .Page.BundleType) -}}
+
 {{/* https://gohugo.io/functions/transform/unmarshal/ */}}
-{{- with .Page.Resources.Get $path -}}
-  {{- with unmarshal .Content -}}
-    {{- $data = . -}}
+{{- if (not $isLocal) -}}
+  {{- with resources.GetRemote $path -}}
+    {{- with unmarshal .Content -}}{{- $data = . -}}{{- end -}}
+  {{- else -}}
+    {{- errorf "Remote resource not found: %s" $path -}}
+  {{- end -}}
+{{- else if (not $isPage) -}}
+  {{- with .Page.Resources.Get $path -}}
+    {{- with unmarshal .Content -}}{{- $data = . -}}{{- end -}}
+  {{- else -}}
+    {{- errorf "Local resource not found: %s" $path -}}
   {{- end -}}
 {{- else -}}
-  {{- errorf "Resource not found: %s" $path -}}
+  {{- with resources.Get $path -}}
+    {{- with unmarshal .Content -}}{{- $data = . -}}{{- end -}}
+  {{- else -}}
+    {{- errorf "Local resource not found: %s" $path -}}
+  {{- end -}}
 {{- end -}}
 
 {{- $language := index $data "metadata" "language_info" "name" | default "python" -}}
@@ -19,7 +34,9 @@
     {{- if eq (index $cell "cell_type") "code" -}}
       {{- $source := index $cell "source" -}}
       {{- $sourceContent := (cond (reflect.IsSlice $source) (delimit $source "") $source) -}}
-{{ (printf "\n```%s\n%s\n```\n" $language $sourceContent) | safeHTML -}}
+{{- with ($sourceContent | strings.Chomp) -}}
+{{ (printf "\n\n```%s\n%s\n```\n" $language .) | safeHTML -}}
+{{- end -}}
 
       <div class="hextra-jupyter-code-cell hextra-scrollbar">
         {{- $outputs := index $cell "outputs" -}}