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/EsriHTML/TestModule/websocketTest.html

@@ -0,0 +1,54 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8" />
+<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
+<html>
+
+<head>
+    <title>MapView</title>
+    <style>
+        table {
+            border-collapse: separate;
+        }
+
+        th,
+        td {
+            text-align: left;
+            padding: 8px;
+        }
+
+        .headcol {
+            position: absolute;
+            left: 0;
+        }
+
+        #mapDiv {
+            height: 760px;
+            width: 700px;
+        }
+
+        #infoDiv {
+            position: absolute;
+            top: 12%;
+            left: 60%;
+        }
+
+        #infoDiv input {
+            border: none;
+            box-shadow: rgba(0, 0, 0, 0.3) 0px 1px 2px;
+        }
+    </style>
+    <link rel="stylesheet" href="https://js.arcgis.com/4.7/esri/css/main.css">
+    <script src="https://js.arcgis.com/4.7/"></script>
+    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
+    <script src="websocketTest.js"></script>
+    <!-- <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
+    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
+    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> -->
+
+</head>
+
+<body>
+    <div id="viewDiv"></div>
+</body>
+
+</html>