feat(nim): added queries and tests

[HiPhish]

How and from there did you install the Nim parser? When I execute TSInstall nim I get Parser not available for language "nim".

[aMOPel]

The pr to add nim to nvim-treesitter was only merged 2 weeks ago. Maybe you need to update you plugin?

[HiPhish]

I have made a couple of changes:

• Formatted the patterns to be more like other queries
• Renamed the test file to be more like the other test files
• Fixed the cast pattern by merging both patterns into one

We are no longer bound to the limitation of just one opening and one closing node per container. Both the [, ] and the (, ) can be part of the same container on the same level.

(cast
  type: "[" @delimiter
  type: "]" @delimiter
  value: "(" @delimiter
  value: ")" @delimiter @sentinel) @container

If you agree with my changes please squash the commits into one, then I can merge your PR.

[aMOPel]

Thank you :)

All done.

[HiPhish]

Merged, thank you very much.