Add Visual Basic 6.0 as its own language

[DecimalTurn]

Description

This pull request adds VB6 as its own language and removes the aliases for VBA that were related to VB6.
This PR aims at solving issue #5824 and takes major inspiration from PR #4725.

For the color, I went with a green close to the green from the VB6 logo.

The extensions provided aren't shared with any languages in languages.yml, so no additional grammar or heuristic is necessary. The VB.NET grammar should suffice for now as it was also the grammar used when adding VBA.

Checklist:

• I am adding a new language.
  • The extension of the new language is used in hundreds of repositories on GitHub.com.
    • Search results for each extension:
      • https://github.com/search?utf8=%E2%9C%93&type=Code&ref=searchresults&q=extension%3Actl+End+Sub+NOT+nothack
      • https://github.com/search?utf8=%E2%9C%93&type=Code&ref=searchresults&q=extension%3ADsr+End+Sub+NOT+nothack
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • https://github.com/kellyethridge/SimplyVBUnit/blob/master/Source/Component/UIListBox.ctl
      • https://github.com/jaygadhave/BCA-BCS-MANAGEMENT-SYSTEM/blob/ebaed2ee5141dff5a3573a358d5440eb1dc0cd70/DataReport1.Dsr
      • https://github.com/bmbodj/ECSE437-Project/blob/fd28fdbe07bd1c7a1ea60650fc91ef18e49d1bef/main/migrationanalysis/src/wizard/Wizard.Dsr
    • Sample license(s):
      • kellyethridge/SimplyVBUnit: MIT
      • jaygadhave/BCA-BCS-MANAGEMENT-SYSTEM: MIT
      • bmbodj/ECSE437-Project: Apache License 2.0
  • I have included a syntax highlighting grammar: [URL to grammar repo]
  • I have updated the heuristics to distinguish my language from others using the same extension.

[DecimalTurn]

And regarding the .Dsr sample, I was a little bit limited by the fact that a license is needed. The problem with the current sample is that it has no sub procedures defined in it. We only have designer metadata. This is representative of a good portion of .Dsr files, but for completeness, it might be useful to add another sample with a few sub procedure definitions.

[DecimalTurn]

Thanks @lildude!

[Gagniuc]

Does the new modification make an association between ".vbp" and Visual Basic 6.0, or ".vbw" and Visual Basic 6.0?
If it doesn't, can you please make this possible? Because if you look at my own Visual Basic 6.0 projects, there are no ".ctl" or ".dsr" files at all. But all the Visual Basic 6.0 projects that I have seen so far have something in common: files with the extension ".vbp" and ".vbw". More than likely for this reason we do not see any change.

[lildude]

Does the new modification make an association between ".vbp" and Visual Basic 6.0, or ".vbw" and Visual Basic 6.0?

No. You'll need to use a manual override. I see this has also been asked and answered in #5824

[Gagniuc]

Does the new modification make an association between ".vbp" and Visual Basic 6.0, or ".vbw" and Visual Basic 6.0?

No. You'll need to use a manual override. I see this has also been asked and answered in #5824

Thanks for the replay. In my view it is not ok to use manual override for VB6 projects on GitHub. I'm personally curious how many VB6 projects are on GitHub. This language is among the most important languages produced by our civilization. I mean, there are new languages that no one has ever heard of that are listed by the linguist, while VB6 is not. VB6 was the most popular computer language in the world for a long time and today it is used by a large mass of scientists and engineers for prototyping projects. Recognizing the VB6 language by default is a decent thing to do on GitHub. I am certain in the end this will be resolved.

[lildude]

Recognizing the VB6 language by default is a decent thing to do on GitHub. I am certain in the end this will be resolved.

Indeed. As I mentioned in the issue, a heuristic would be needed to do this. Please feel free to submit a PR that implements such a heuristic.

Locking this as the discussion should be taking in place in issues now this PR has been merged.