add new sections for docs

qdrant-landing/content/documentation/api-reference.md

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+---
+title: API Reference
+weight: 20
+---

qdrant-landing/content/documentation/benchmarks.md

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+---
+title: Benchmarks
+weight: 100
+---

qdrant-landing/content/documentation/contribution-guidelines.md

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+---
+title: Contribution Guidelines
+weight: 70
+---

qdrant-landing/content/documentation/python-client.md

@@ -1,5 +1,4 @@
 ---
 title: Python Client
-weight: 40
-draft: true
+weight: 20
 ---

qdrant-landing/content/documentation/release-notes.md

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+---
+title: Release Notes
+weight: 70
+---

qdrant-landing/content/documentation/roadmap.md

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+---
+title: Roadmap
+weight: 90
+---

qdrant-landing/content/documentation/technical-support.md

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+---
+title: Technical Support
+weight: 80
+---