Add OMNeT++ NED language

[adamgeorge309]

This adds the OMNeT++ NED language.

Description

NED (extension .ned) is a DSL for the OMNeT++ network simulator. It is used by model frameworks for OMNeT++, such as the INET framework, Simu5G, Veins, etc. We are the team that develops OMNeT++ and the INET Framework and we have created a TextMate grammar for this language.

Checklist:

• [x] I am adding a new language.
  • [x] The extension of the new language is used in hundreds of repositories on GitHub.com.
  • Search results for each extension:
    • https://github.com/search?type=code&q=NOT+is%3Afork+path%3A*.ned+package
  • [x] I have included a real-world usage sample for all extensions added in this PR:
  • Sample source(s):
    • https://github.com/inet-framework/inet
  • Sample license(s):
    • LGPLv3
  • [x] I have included a syntax highlighting grammar: https://github.com/omnetpp/omnetpp-textmate-ned
  • [x] I have added a color
  • Hex value: #08607c
  • Rationale: Matches the branding guidelines for the OMNeT++ project.
  • [ ] I have updated the heuristics to distinguish my language from others using the same extension.

[lildude]

Please merge main into your branch again as I can't approve CI to run without the latest changes.

[adamgeorge309]

Merged. Thank you!