Search: Use relative URLs within generated configuration and data files

Always use relative URLs when generating the configuration and data file
for the search bar.
This fixes issues with deployments that run under a sub-path, e.g.
https://example.com/path.

assets/search/config.json

@@ -1,7 +1,7 @@
 {{- $searchDataFile := printf "search/%s.data.json" .Language.Lang -}}
 {{- $searchData := resources.Get "search/data.json" | resources.ExecuteAsTemplate $searchDataFile . | resources.Minify -}}
 {
-  "dataFile": {{ $searchData.RelPermalink | jsonify }},
+  "dataFile": {{ printf ".%s" $searchData.RelPermalink | jsonify }},
   "indexConfig": {{ .Site.Params.geekdocSearchConfig | jsonify }},
   "showParent": {{ if .Site.Params.geekdocSearchShowParent }}true{{ else }}false{{ end }},
   "showDescription": {{ if .Site.Params.geekdocSearchshowDescription }}true{{ else }}false{{ end }}

assets/search/data.json

@@ -3,7 +3,7 @@
     {{ if ne $index 0 }},{{ end }}
     {
       "id": {{ $index }},
-      "href": "{{ $page.RelPermalink }}",
+      "href": ".{{ $page.RelPermalink }}",
       "title": {{ (partial "utils/title" $page) | jsonify }},
       "parent": {{ with $page.Parent }}{{ (partial "utils/title" .) | jsonify }}{{ else }}""{{ end }},
       "content": {{ $page.Plain | jsonify }},