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/Services/ParticipantManagement/ppm_predefined_data.sql

@@ -0,0 +1,8 @@
+-- Generic technical areas for all exercises and all training areas (assuming 1 default technical area for each TA)
+
+SET SEARCH_PATH TO ex_%ex_id%, PUBLIC;
+INSERT INTO ppm_party (id, role_id, name, color, fading_color, is_used_by, hla_force_identifier, properties ) SELECT id, role_id, name, color, fading_color, false,  hla_force_identifier, '{}' FROM ppm.ppm_party;
+
+-- for each ADLER chargeType and each party one entry with 10000 and effectSource = ADLER_STANDALONE(3)
+INSERT INTO aes_charge_administration( charge_type_id, party_id, effect_source_id, amount, planned, used, changed, amount_changed_by_operator) SELECT ct.id, p.id, 3, 10000, 0, 0, 0, false from pdm.pdm_charge_type ct CROSS JOIN ppm_party p where ct.properties->>'isAdlerChargeType' = 'true';
+