[PATCH] ref-manual: add intro content to Ref Manual "Tasks" section

As in done in the "Classes" section, add a couple paragraphs to
explain how the developer can examine the tasks for a recipe.

Signed-off-by: Robert P. J. Day <[email protected]>

---

diff --git a/documentation/ref-manual/tasks.rst b/documentation/ref-manual/tasks.rst
index e6301e708..7c8bd0a82 100644
--- a/documentation/ref-manual/tasks.rst
+++ b/documentation/ref-manual/tasks.rst
@@ -9,6 +9,35 @@ tasks to complete configuring, compiling, and packaging software. This
 chapter provides a reference of the tasks defined in the OpenEmbedded
 build system.

+To see the tasks defined (in alphabetical order) for a given recipe,
+you can run:
+
+.. code-block:: console
+
+   $ bitbake -c listtasks recipename
+   do_build                              Default task for a recipe - depends on all other normal tasks required to 'build' a recipe
+   do_checkuri                           Validates the SRC_URI value
+   do_clean                              Removes all output files for a target
+   do_cleanall                           Removes all output files, shared state cache, and downloaded source files for a target
+   do_cleansstate                        Removes all output files and shared state cache for a target
+   do_compile                            Compiles the source in the compilation directory
+   .. etc etc ...
+
+In addition, once a recipe has been built, you can find in that recipe's
+``${WORKDIR}/temp/`` directory not only all of the "run" and "log" files
+for every task executed for that recipe, but a ``log.task_order`` file
+that lists the order of execution of those tasks:
+
+.. code-block:: console
+
+   $ cat log.task_order
+   20260626-045459.439754 do_fetch (3798706): log.do_fetch.3798706
+   20260626-045459.805253 do_unpack (3798765): log.do_unpack.3798765
+   20260626-045501.005518 do_patch (3798918): log.do_patch.3798918
+   20260626-045501.012781 do_prepare_recipe_sysroot (3798919): log.do_prepare_recipe_sysroot.3798919
+   20260626-045501.210527 do_populate_lic (3798933): log.do_populate_lic.3798933
+   ... etc etc ...
+
 Normal Recipe Build Tasks
 =========================