added support for .nimble files

[ire4ever1190]

added support for .nimble files which is what nim uses with its build tool nimble
added syntax highlighting task which is used in nimble files

[ire4ever1190]

nim check doesn't work well with .nimble files
is there anyway to disable linting for .nimble files while keeping the syntax highlighting (without needed to create a seperate syntax file)?

[MasFlam]

@ire4ever1190 You can create a separate syntax file like nimble.yaml that would - include: "nim". This would copy syntax highlighting from Nim, but make .nimble files be their own separate filetype, which would make the linter plugin not run on them.

[ire4ever1190]

Ah thank you, that will help me clean this up