Shortcode for rendering code snippets from separate markdown files (#1548)

* shortcode for rendering code snippets from separate markdown files

* formatted code

* fix and readme

* semi-automatically extracts snippets from markdown

* extract snippets from points.md

* extract snippets from vectors.md

* extract snippets from payload.md

* extract snippets from search.md + fixes

* extract snippets from explore.md

* extract snippets from hybrid-queries.md + mode query by id into search

* extract snippets from filtering.md

* extract snippets from storage.md + update outdated info

* extract snippets from indexing.md

* extract snippets from snapshots.md

* extract snippets from guides/optimize.md

* extract snippets from guides/multiple-partitions.md + fix aside note

* extract snippets from guides/quantization.md

* use auto-generated descriptions

* order json snippets first

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Co-authored-by: generall <andrey@vasnetsov.com>

qdrant-landing/content/documentation/headless/_index.md

@@ -0,0 +1,11 @@
+---
+build:
+  list: never
+  publishResources: false
+  render: never
+cascade:
+- build:
+    list: never
+    publishResources: false
+    render: never
+---