Add naming clarification to distinguish from datalab-org project

[Copilot]

Adds clarification notes to avoid confusion with the unrelated datalab-org project, which focuses on materials science databases and computational tools.

Changes:

• README.md: Added note after project description linking to datalab-org.io
• doc/index.rst: Added note directive in documentation introduction with same clarification

Both notes explicitly state that DataLab Platform is separate from and unrelated to the datalab-org initiative.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Clarify naming distinction with datalab-org project in README and documentation</issue_title>
<issue_description>To help avoid confusion with the datalab-org project (which shares a similar name but is unrelated), we should add a clear note in our main README.md as well as in the project documentation.

Tasks:

• Add a short explanatory note to the top-level README.md, linking to https://datalab-org.io.
• Add a similar clarification in the documentation introduction.

See issue #185 raised by @ml-evs regarding potential name confusion.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Clarify naming distinction with datalab-org project in README and documentation #187

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