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/specs/external/git_with_committer

@@ -0,0 +1,91 @@
+#!/bin/sh
+#
+# $Id$
+# $HeadURL$
+#
+# alias git git_with_commiter
+#
+
+function setupAuthorCommiter() {
+    # predefined users
+    declare -a users=( \
+        'Christian Ehrlicher' \
+        'Hanna Rathje' \
+        'Hannes Bäuerle' \
+        'Hans-Jürgen Lampe' \
+        'Iuliana Ojog' \
+        'Malte Diers' \
+        'Mike Wille' \
+        'Norbert Thoden' \
+        'Patrick Galler' \
+        'Patric Karwat' \
+    )
+
+    # the users in the last 1000 commits
+    committers=`git log --pretty=format:%aN -n 1000 | sort -u `
+
+    # join arrays committers and users
+    while read -r line; do
+        users=("${users[@]}" "$line")
+    done <<< "$committers"
+
+    # make users unique
+    IFS=$'\n' committers=($(sort -u <<<"${users[*]}"))
+
+    # the last committer
+    last_committer=`git log --pretty=format:%aN -n 1`
+
+    # show possible users
+    echo -e "\e[31mAvailable committers:\e[0m"
+    defaultId=0
+    for ((i=0; i < ${#committers[@]};i++)) {
+        idx=$((i + 1))
+        if [ "${committers[$i]}" = "$last_committer" ] ; then
+            defaultId=$idx
+            echo -e "\e[32m $idx - ${committers[$i]}\e[0m (default)"
+        else
+            echo " $idx - ${committers[$i]}"
+        fi
+    }
+    echo " 0 - new committer"
+    echo "enter a number for the committer to use or nothing for the last committer"
+
+    # now ask for the committer to use
+    while [ true ]; do
+        echo -n "Please enter number [default=${defaultId}]: "
+        read line < /dev/stdin
+        # empty -> default
+        if [ -z $line ] ; then
+            line=$defaultId
+        fi
+        # its a digit and between the valid range
+        if [ -z "${line##[0-9]*}" ] && [ "$line" -ge 0 ] && [ "$line" -le "${#committers[@]}" ]; then
+            break
+        fi
+    done
+
+    if [ $line -eq 0 ] ; then
+        echo -n "Please enter full committer name:"
+        read git_name < /dev/stdin
+    else
+        git_name=${committers[$((line - 1))]}
+    fi
+
+    git_email="${git_name// /.}@rheinmetall.com"
+    echo "Using '$git_name ($git_email)' as author and committer"
+
+    export GIT_AUTHOR_NAME="$git_name"
+    export GIT_AUTHOR_EMAIL="$git_email"
+    export GIT_COMMITTER_NAME="$git_name"
+    export GIT_COMMITTER_EMAIL="$git_email"
+}
+
+if [ $# -ge 1 ] ; then
+    gitopt="$1"
+    case $gitopt in
+        commit) setupAuthorCommiter ;;
+        *);;
+    esac
+fi
+
+exec git "$@"