docs: Banners for the survey (#6624)

Author: igorlukanin

docs/content/GraphQL-API/GraphQL-API.mdx

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+<SuccessBox>
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+**We’re running a survey to better understand how you use Cube.** Please take a moment to [share with us what you think](https://forms.gle/b7iQHpocAXfpNfeR7). It will mean the world to us.
+
+</SuccessBox>
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 ## Getting started
 
 First, ensure you're running Cube v0.28.58 or later. Then start the project

docs/content/REST-API/Query-Format.mdx

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+<SuccessBox>
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+**We’re running a survey to better understand how you use Cube.** Please take a moment to [share with us what you think](https://forms.gle/b7iQHpocAXfpNfeR7). It will mean the world to us.
+
+</SuccessBox>
+
 Cube Queries are plain JavaScript objects, describing an analytics query. The
 basic elements of a query (query members) are `measures`, `dimensions`, and
 `segments`.

docs/content/REST-API/REST-API.mdx

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+<SuccessBox>
+
+**We’re running a survey to better understand how you use Cube.** Please take a moment to [share with us what you think](https://forms.gle/b7iQHpocAXfpNfeR7). It will mean the world to us.
+
+</SuccessBox>
+
 ## Prerequisites
 
 ### <--{"id" : "Prerequisites"}--> Base path

docs/content/SQL-API/Overview.mdx

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+<SuccessBox>
+
+**We’re running a survey to better understand how you use Cube.** Please take a moment to [share with us what you think](https://forms.gle/b7iQHpocAXfpNfeR7). It will mean the world to us.
+
+</SuccessBox>
+
 <WarningBox heading={`Migration to Postgres protocol`}>
 
 This is documentation of Cube’s SQL API for the Postgres protocol. The MySQL