docs: Include simplified link titles in main index

Include simplified link titles in the main page's documentation index to
enhance website's readability and UX. Update the text that directs users to
various documents without changing the actual titles chosen by the authors.
Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240109155643.3489369-3-carlos.bilbao@amd.com

Documentation/index.rst

@@ -22,10 +22,10 @@ community and getting your work upstream.
 .. toctree::
    :maxdepth: 1
 
-   process/development-process
-   process/submitting-patches
+   Development process <process/development-process>
+   Submitting patches <process/submitting-patches>
    Code of conduct <process/code-of-conduct>
-   maintainer/index
+   Maintainer handbook <maintainer/index>
    All development-process docs <process/index>
 
 
@@ -38,10 +38,10 @@ kernel.
 .. toctree::
    :maxdepth: 1
 
-   core-api/index
-   driver-api/index
-   subsystem-apis
-   Locking in the kernel <locking/index>
+   Core API <core-api/index>
+   Driver APIs <driver-api/index>
+   Subsystems <subsystem-apis>
+   Locking <locking/index>
 
 Development tools and processes
 ===============================
@@ -51,15 +51,15 @@ Various other manuals with useful information for all kernel developers.
 .. toctree::
    :maxdepth: 1
 
-   process/license-rules
-   doc-guide/index
-   dev-tools/index
-   dev-tools/testing-overview
-   kernel-hacking/index
-   trace/index
-   fault-injection/index
-   livepatch/index
-   rust/index
+   Licensing rules <process/license-rules>
+   Writing documentation <doc-guide/index>
+   Development tools <dev-tools/index>
+   Testing guide <dev-tools/testing-overview>
+   Hacking guide <kernel-hacking/index>
+   Tracing <trace/index>
+   Fault injection <fault-injection/index>
+   Livepatching <livepatch/index>
+   Rust <rust/index>
 
 
 User-oriented documentation
@@ -72,11 +72,11 @@ developers seeking information on the kernel's user-space APIs.
 .. toctree::
    :maxdepth: 1
 
-   admin-guide/index
-   The kernel build system <kbuild/index>
-   admin-guide/reporting-issues.rst
-   User-space tools <tools/index>
-   userspace-api/index
+   Administration <admin-guide/index>
+   Build system <kbuild/index>
+   Reporting issues <admin-guide/reporting-issues.rst>
+   Userspace tools <tools/index>
+   Userspace API <userspace-api/index>
 
 See also: the `Linux man pages <https://www.kernel.org/doc/man-pages/>`_,
 which are kept separately from the kernel's own documentation.
@@ -89,8 +89,8 @@ platform firmwares.
 .. toctree::
    :maxdepth: 1
 
-   firmware-guide/index
-   devicetree/index
+   Firmware <firmware-guide/index>
+   Firmware and Devicetree <devicetree/index>
 
 
 Architecture-specific documentation
@@ -99,7 +99,7 @@ Architecture-specific documentation
 .. toctree::
    :maxdepth: 2
 
-   arch/index
+   CPU architectures <arch/index>
 
 
 Other documentation
@@ -112,7 +112,7 @@ to ReStructured Text format, or are simply too old.
 .. toctree::
    :maxdepth: 1
 
-   staging/index
+   Unsorted documentation <staging/index>
    RAS/ras
 
 
@@ -122,7 +122,7 @@ Translations
 .. toctree::
    :maxdepth: 2
 
-   translations/index
+   Translations <translations/index>
 
 Indices and tables
 ==================