update documentation, include missing workflows and glossary entries

docs/source/glossary.rst

docs/source/module/workflows/iptrunk/deploy_twamp.rst

docs/source/module/workflows/iptrunk/index.rst

docs/source/module/workflows/iptrunk/validate_iptrunk.rst

docs/source/module/workflows/router/index.rst

docs/source/module/workflows/router/validate_router.rst

gso/workflows/iptrunk/deploy_twamp.py

gso/workflows/iptrunk/migrate_iptrunk.py

gso/workflows/iptrunk/validate_iptrunk.py

gso/workflows/router/create_router.py

gso/workflows/router/validate_router.py