Success-story migration + new plugins + JSON/UX polish

- Success Stories: full migration from old site (48/48, audited),
  markets n:n, quotation content block, columns content block,
  pretty SEO detail URLs via SuccessStoryPathRewrite middleware,
  list/detail split (list page 4 / story page), detailUrl/backUrl
- New plugins: VITEC Locations (grid/list/map + RTE map text),
  VITEC Customer Logos (color/bw logic, only-show-selected),
  VITEC Card (one plugin for product/story/market/solution
  with reloading FlexForm + custom backend preview renderer)
- Eventlist: layout dropdown (list/grid/teaserbar) in settings
- Hero section CB: Images/Video tabs, background video + overlay
- Product JSON: full category rootline (parents), fixed missing
  ConnectionPool import (all-products crash), category tree map
- Backend preview CSS: container-query responsive (narrow columns)
- Docs: ISO architecture spec, root + extension READMEs

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/vitec/Configuration/FlexForms/Locationlist.xml

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<T3DataStructure>
+    <meta>
+        <langDisable>1</langDisable>
+    </meta>
+    <sheets>
+        <sDEF>
+            <ROOT>
+                <sheetTitle>Locations Settings</sheetTitle>
+                <type>array</type>
+                <el>
+                    <settings.variant>
+                        <label>Display Variant</label>
+                        <config>
+                            <type>select</type>
+                            <renderType>selectSingle</renderType>
+                            <items>
+                                <numIndex index="0">
+                                    <label>Grid</label>
+                                    <value>grid</value>
+                                </numIndex>
+                                <numIndex index="1">
+                                    <label>List</label>
+                                    <value>list</value>
+                                </numIndex>
+                                <numIndex index="2">
+                                    <label>Map</label>
+                                    <value>map</value>
+                                </numIndex>
+                            </items>
+                            <default>grid</default>
+                        </config>
+                    </settings.variant>
+
+                    <settings.maptext>
+                        <label>Map Text</label>
+                        <description>Rich text shown alongside the map (Map variant only).</description>
+                        <displayCond>FIELD:settings.variant:=:map</displayCond>
+                        <config>
+                            <type>text</type>
+                            <rows>8</rows>
+                            <enableRichtext>1</enableRichtext>
+                        </config>
+                    </settings.maptext>
+
+                    <settings.debug>
+                        <label>Allow Debug Output</label>
+                        <config>
+                            <type>check</type>
+                            <default>0</default>
+                        </config>
+                    </settings.debug>
+                </el>
+            </ROOT>
+        </sDEF>
+    </sheets>
+</T3DataStructure>