<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/149839>149839</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-tools-extra][docs] Add previous versions of `clang-tools-extra` site in index.html.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            documentation,
            clang-tools-extra
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          vbvictor
      </td>
    </tr>
</table>

<pre>
    For now, when user visit clang-tools-extra main page https://clang.llvm.org/extra/index.html, he can only see WIP version of current developing LLVM branch. There is no good way to find release notes from previous releases, e.g. 19th, 20th, 21st.
<img width="1578" height="1095" alt="Image" src="https://github.com/user-attachments/assets/11ad4acc-3fa9-40a7-8322-c9bdaf2bd3ae" />

By googling, I could find snapshot of 16th release of clang-tools-extra - https://releases.llvm.org/16.0.0/tools/clang/tools/extra/docs/index.html.
But if I change `16` to any other number - there is no page.

I propose making a list in index.html or a dedicated page that would have working links to previous versions of `clang-tools-extra` so that a user could read release-notes and documentation of `clang-tool` that they currently use. 
</pre>
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