[ADD] survey_dropdown_simple_choice

Display "Multiple choice: only one answer" (simple_choice) survey
questions as a dropdown list instead of radio buttons, per question.

The native radios are kept (hidden by CSS) and still carry the answer:
the dropdown only clicks them, so validation, conditional questions,
"Other" comment, auto-submit and AJAX submit are handled natively.
In review / print mode, only the selected and correct answers are
displayed. Native rendering is kept when suggested answers contain
images.

Assisted-By: Claude Opus 5.5 <noreply@anthropic.com>

survey_dropdown_simple_choice/__manifest__.py

@@ -0,0 +1,27 @@
+{
+    "name": "Survey Dropdown Simple Choice",
+    "summary": "Display some single choice survey questions as a dropdown list",
+    "description": "Adds a boolean on survey.question to display a "
+                   "\"Multiple choice: only one answer\" question as a dropdown list "
+                   "instead of radio buttons, with support for conditional questions "
+                   "and \"Other\" comments.",
+    "author": "Elabore",
+    "website": "https://www.elabore.coop",
+    "category": "Marketing/Surveys",
+    "license": "AGPL-3",
+    "version": "16.0.1.0.0",
+    "depends": ["survey"],
+    "data": [
+        "views/survey_question_views.xml",
+        "views/survey_templates.xml",
+    ],
+    "assets": {
+        "survey.survey_assets": [
+            "survey_dropdown_simple_choice/static/src/scss/survey_dropdown.scss",
+            "survey_dropdown_simple_choice/static/src/js/survey_form_dropdown.js",
+        ],
+    },
+    "installable": True,
+    "application": False,
+    "auto_install": True,
+}