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/qav/modifyJSON.py

@@ -0,0 +1,67 @@
+#!/usr/bin/python
+# coding: utf-8
+#
+
+import json
+import os
+import sys
+
+def generate_compile_commands_from_json(infilename, outfilename, builddir = None):
+  try:
+    if os.path.isfile(outfilename):
+      os.remove(outfilename)
+
+    jsonFile = open(infilename,'r')
+    outFile = open(outfilename, 'w')
+
+    for command in json.load(jsonFile):
+      # blacklist build dir
+      if builddir:
+        fn = command['file']
+        if command['file'].startswith(builddir):
+          continue
+          # whilelist some generated files (generated by us) - is not useful since qacpp can't handle dds data types
+          #if not '_impl' in fn and not '_plugin.cpp' in fn:
+          #  if 'moc_' in fn:
+          #    continue
+      # not sure why \" must be replaced with \"" - but that's the output of the old script
+      # .acf file is not used, add some defines...
+      cmd = '  "' + command['command'].replace('-isystem ', '-I').replace('-isystem', '-I').replace('-I ', '-I').replace('\\\\\\','\\"').replace('\"', '\""') + ' "\n'
+      outFile.write(cmd)
+
+    return True
+  except Exception as e:
+    print >> sys.stderr, "Error generating compile commands file '%s': %s" % (outfilename, e)
+    return False
+
+########### START --- CHECK FOR VALID OPTION AND PATH ###########
+def main():
+  print sys.argv[1]
+  print sys.argv[2]
+  try:
+    usageOption = sys.argv[1]
+  except:
+    print ('''You forgot to add a OPTION
+    -path <path>
+    ''')
+    sys.exit()
+  try:
+    path = sys.argv[2]
+  except:
+    print ('''You forgot to add a PATH
+    -path <path>
+    ''')
+    sys.exit()
+
+  if ( usageOption == '-path'):
+    jsonOrigFile = os.path.abspath(path+'/compile_commands.json')
+    outfilename  = os.path.abspath(path+'/compile_commands.txt')
+    if not os.path.isfile(jsonOrigFile):
+      print >> sys.stderr, "Could not find compile commands file %s... aborting" % jsonOrigFile
+      sys.exit(1)
+    generate_compile_commands_from_json(jsonOrigFile, outfilename)
+
+########### END --- CHECK FOR VALID OPTION AND PATH ###########
+
+if __name__ == "__main__":
+    main()