[Doc][Documentation] Use hyperlinks to link unlinked Readme.md content to Website

[keon94]

Documentation Scope

Readme.md

Describe the Change

The Readme contains duplicated content from the website (Introduction, Datasources, Create Blueprint, etc). This makes managing it cumbersome (we have to track both places). I suggest we simply link these sections to the website as well, like we have with "Getting Started", to make the Readme content minimal. If we want the Readme to contain actual text content we should look into embedding doc pages from the website rather than duplicating content.

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