feat(lab16): add VPN GRE tunnel configuration lab files

docs(changelog): add v11.0.0 entries for lab15 OSPF dynamic routing

feat(lab15): add OSPF dynamic routing lab files

feat(lab14): add static routing lab files

docs(changelog): add v9.0.0 entries for lab13 static routing preparation

feat(lab13): add static routing preparation lab files

docs(changelog): add v8.0.0 entries for lab12 NAT configuration

feat(lab12): add NAT configuration lab files

docs(changelog): add v7.0.0 entries for lab11 NAT planning

feat(lab11): add NAT planning lab files (topology, report, presentation)