Serve Markdown when requested (#2181)

* Add support for rendering each page as md

* On md pages, change relative links to go to md version

* Netlify: respond with md if accept header equals text/markdown

* Render shortcodes

* Remove netlify accept header functionality

qdrant-landing/layouts/shortcodes/code-snippet.markdown.md

@@ -0,0 +1,49 @@
+{{- $path := .Get "path" -}}
+{{- $order := .Get "order" -}}
+{{- $block := .Get "block" -}}
+
+{{- if $order -}}
+  {{- $order = split $order " " -}}
+{{- else -}}
+  {{- $order = slice -}}
+  {{- $currentPath := $path -}}
+  {{- $currentPathParts := split $currentPath "/" -}}
+  {{- $numParts := len $currentPathParts -}}
+  {{- range seq $numParts -}}
+    {{- $index := sub $numParts . -}}
+    {{- $currentPath = delimit (first (add $index 1) $currentPathParts) "/" -}}
+    {{- $sectionPage := $.Site.GetPage "section" $currentPath -}}
+    {{- if and $sectionPage $sectionPage.Params.snippetsOrder -}}
+      {{- $order = $sectionPage.Params.snippetsOrder -}}
+      {{- break -}}
+    {{- end -}}
+  {{- end -}}
+{{- end -}}
+
+{{- $files := dict -}}
+{{- range $dir := slice (printf "content/%s" $path) (printf "content/%s/generated/%s" $path $block) -}}
+  {{- if not (fileExists $dir) -}}
+    {{- continue -}}
+  {{- end -}}
+  {{- range (readDir $dir) -}}
+    {{- if or (strings.HasPrefix .Name "_") (not (strings.HasSuffix .Name ".md")) -}}
+      {{- continue -}}
+    {{- end -}}
+    {{- $filePath := printf "%s/%s" $dir .Name -}}
+    {{- $content := readFile $filePath -}}
+    {{- $files = merge $files (dict (strings.TrimSuffix ".md" .Name) $content) -}}
+  {{- end -}}
+{{- end -}}
+
+{{- range $order -}}
+  {{- $snippet := index $files . -}}
+  {{- if $snippet }}
+{{ $snippet }}
+  {{- end -}}
+{{- end -}}
+
+{{- range $name, $content := $files -}}
+  {{- if not (in $order $name) }}
+{{ $content }}
+  {{- end -}}
+{{- end -}}

qdrant-landing/layouts/shortcodes/include.markdown.md

@@ -0,0 +1 @@
+{{- readFile (.Get 0) -}}