Qt6 Migration: Complete migration with DDS/RTI support and build validation

Major Changes:
- Merged latest Qt5 devel content from dlbo (292 files changed, 7 new dirs)
- Consolidated forward-declarations and include folders
- Removed unneeded modules per Niklas' repo check list

Build System Fixes:
- Fixed CMake VERSION_GREATER syntax in ParticipantManagement/CMakeLists.txt
- Added VLC packages (libvlc-dev, vlc-plugin-base) to docker_build.sh
- Added PostgreSQL dev packages (libpq-dev, postgresql-server-dev-all) to Dockerfile
- Fixed locale warnings (ANSI_X3.4-1968 → C.UTF-8)
- Fixed ArcGIS SDK path warnings when BUILD_ARCGIS=OFF

Code Generation Fixes:
- Fixed IDL enum collisions (PortType→CorePortType/DdsutPortType, PdmEventType)
- Fixed Grantlee template svc_translation.cpp.grantlee:
  - Changed {{ idl_enum.name }}_def:: to {{ idl_enum.name }}::
  - Fixed .underlying() calls for C++11 scoped enums (enum class)
- Removed generated files from repo (moc_*, *_dtc.h, *_ftc.h)

Validation:
- BUILD_RTI=ON: SUCCESS
- BUILD_RTI=OFF: SUCCESS
- C++17 standard maintained for RTI 7.7 compatibility
- Ubuntu 26.04 Docker environment verified

Remaining Warnings (expected):
- BgViewer, KDChart, KDReports, Poppler-Qt6 not found (optional features)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt5-before/dlbo/Lts/Tools/JustusTimeline/style.css

@@ -0,0 +1,56 @@
+
+* {
+    box-sizing: border-box;
+  }
+  /* Set Map options */
+  .map-content{
+    display:flex;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+    height: 890px;
+  }
+  /* Set Map Size */
+  #map {
+    width: 80%;
+    height: 100%;
+  }
+  /* center everything */
+  .contenta
+  {
+      color: azure;
+      text-align: center;
+      align-content: center;
+  }
+  /* Set a background color */
+  body {
+    background-color: #474e5d;
+    font-family: Helvetica, sans-serif;
+  }
+
+  /* Container around content */
+  .container {
+    padding: 10px 40px;
+    position: relative;
+    background-color: inherit;
+    width: 50%;
+  }
+
+  /* The actual content */
+  .content {
+    padding: 20px 30px;
+    background-color: white;
+    position: relative;
+    border-radius: 6px;
+    display:flex;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+  }
+
+  /* Full-width containers */
+    .container {
+      width: 100%;
+      padding-left: 70px;
+      padding-right: 25px;
+    }