[clang] [clang][docs] Add all clang-tools-extra to 'ClangTools.rst' (PR #148622)

[via cfe-commits]

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@@ -89,14 +89,49 @@ they'll be tracked here. The focus of this documentation is on the scope
 and features of the tools for other tool developers; each tool should
 provide its own user-focused documentation.
 
-``clang-tidy``
+``Clang-Doc``
+-------------
+
+`Clang-Doc <https://clang.llvm.org/extra/clang-doc.html>`_ is a tool for
+generating C and C++ documentation from source code and comments.
+
+``Clang-Include-Fixer``
+-----------------------
+
+`Clang-Include-Fixer <https://clang.llvm.org/extra/clang-include-fixer.html>`_
+automates the addition of missing ``#include`` directives in a C++ file. It adds
----------------
EugeneZelenko wrote:

This description is different from all others. Should be `is a ...`. Tool also remove unused headers.

https://github.com/llvm/llvm-project/pull/148622