Add Cabal icon

[DavSanchez]

Type

• File icon
• Folder icon

Context and associations

Icons for Haskell files already exist. It would be nice to have icons for <PROJECT_NAME>.cabal or cabal.project files which is the standard package manager/builder for Haskell.

References

• https://github.com/haskell/cabal
• https://www.haskell.org/cabal

Implementations in other icon extensions

• https://github.com/vscode-icons/vscode-icons/blob/master/icons/file_type_cabal.svg
• https://github.com/material-extensions/vscode-material-icon-theme/blob/main/icons/cabal.svg