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/QLedMatrix/README

@@ -0,0 +1,50 @@
+
+QLedMatrix Widget
+-----------------
+
+      The QLedMatrix widget simulates a LED matrix (dot matrix) display.
+
+      A LED matrix display is a 2-dimensional array of dots used to generate
+      characters, symbols and images. It is often seen on machines, clocks and
+      display boards.
+
+      This generic implementation can configured for any size of rows (greater
+      than 0) and columns. The number of colors is not limited, therefore it
+      can be used to make a monochrome, bi-color or even a full RGB display.
+
+      Individual LEDs can be addressed in the matrix by their row and column
+      position. The index (0,0) is located in the upper left corner. Columns
+      grow from left to right, and rows grow from top to bottom.
+
+Installation
+------------
+
+      QLedMatrix library:
+        qmake
+        make
+        make install (or copy the plugin into "<Qt4 dir>/plugins/designer")
+
+      QLedMatrix example:
+        cd example
+        qmake
+        make
+        ./qledmatrix_demo
+
+Copyright
+---------
+
+    Copyright (C) 2009 Pierre-Etienne Messier <pierre.etienne.messier@gmail.com>
+                       http://pemessier.hexpresso.org/
+
+    This library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this library.  If not, see <http://www.gnu.org/licenses/>.