[ADD] survey_xlsx_expand_multiple_choice, survey_xlsx_extra_fields

survey_xlsx_expand_multiple_choice: expand multiple_choice questions into
one Oui/Non column per option, and matrix questions into one column per
row (value = selected option). Relies on the extension hooks added to
survey_xlsx.

survey_xlsx_extra_fields: bridge (auto_install) with survey_extra_fields
that excludes 'file' question types from the XLSX export.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

survey_xlsx_expand_multiple_choice/README.rst

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+.. image:: https://odoo-community.org/readme-banner-image
+   :target: https://odoo-community.org/get-involved?utm_source=readme
+   :alt: Odoo Community Association
+
+====================================
+Survey XLSX - Expand Multiple Choice
+====================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:2ec53fabb2863ebd536f204a7cb4fa4833a634a5711a9e325ed64f50a4c3c4b6
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/license-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/gitea-Elabore%2Fsurvey--tools-lightgray.png
+    :target: https://git.elabore.coop/Elabore/survey-tools/tree/18.0/survey_xlsx_expand_multiple_choice
+    :alt: Elabore/survey-tools
+
+|badge1| |badge2| |badge3|
+
+This module improves the **Survey Results XLSX export** provided by
+``survey_xlsx`` for questions that can hold several answers.
+
+By default such questions are exported as a single column containing every
+selected value joined together, which is hard to analyse in a spreadsheet.
+This module splits them into dedicated columns:
+
+* **Multiple choice** questions (*multiple answers allowed*): one column per
+  possible answer, with ``Oui`` / ``Non`` as value.
+* **Matrix** questions: one column per matrix row, with the selected option
+  as value.
+
+.. warning::
+
+   This module relies on report extension hooks that are **not part of the
+   standard** ``survey_xlsx`` yet. They are introduced by this pull request:
+
+   https://github.com/elabore-coop/survey/pull/1
+
+   You must run a ``survey_xlsx`` that includes these hooks (the PR branch,
+   until it is merged upstream). Installed against a plain ``survey_xlsx``,
+   this module installs without error but the export **silently falls back**
+   to the default one-column-per-question behaviour.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+Export the results of a survey as usual:
+
+#. Go to *Surveys* and open a survey.
+#. Print the *Survey Results XLSX* report.
+
+In the generated spreadsheet:
+
+* A multiple choice question ``Favorite colors`` with options *Red*, *Green*
+  and *Blue* produces three columns ``Favorite colors / Red``,
+  ``Favorite colors / Green`` and ``Favorite colors / Blue``, each containing
+  ``Oui`` or ``Non``.
+* A matrix question ``Satisfaction`` with rows *Dashboards* and *Customer
+  relationship* produces two columns ``Satisfaction / Dashboards`` and
+  ``Satisfaction / Customer relationship``, each containing the selected
+  option (e.g. *Not satisfied at all*).
+
+Other question types keep their standard single-column export.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `Gitea Issues <https://git.elabore.coop/Elabore/survey-tools/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://git.elabore.coop/Elabore/survey-tools/issues/new?body=module:%20survey_xlsx_expand_multiple_choice%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+~~~~~~~
+
+* Elabore
+
+Contributors
+~~~~~~~~~~~~
+
+* `Elabore <https://www.elabore.coop>`_
+
+  * Quentin Mondot
+
+Maintainers
+~~~~~~~~~~~
+
+This module is part of the `Elabore/survey-tools <https://git.elabore.coop/Elabore/survey-tools/tree/18.0/survey_xlsx_expand_multiple_choice>`_ project on git.elabore.coop.
+
+You are welcome to contribute.