- Link detail: added delete button

- added validation entities exist
- added missing constraint rendering statements
- minor template improvements
- code cleanup

- Added/Updated headers
- Added script to update copyright headers

- Updated link/service/slice list/detail pages to show device/endpoint names instead of UUIDs

- corrected selection of context/topology based on new uuid/name separation

- extneded context selection to context/topology
- enabled selection of context/topology to plot
- enabled listing of devices/links based on context/topology
- updated network icon

- corrected constraint display in service list page
- added list of connections related to service in detail page
- added detail of links
- improved look and feel of device detail page
- added feature of loading services through  JSON file

- Moved imports from *.proto folder to common.proto folder
- Removed webui's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline
- Corrected usage of ConfigRules to use new custom ConfigRules
- Moved config variables to new config framework
- Removed unneeded Config variables