Feature request - macros: Get the NimSymKind of a NimSym

[mratsim]

There doesn't seem to be a way to get the NimSymKind of a symbol.

This would be useful to check if a symbol is a var for example

import macros

var a = @[12345]

macro checkImpl(foo: varargs[typed]): untyped =
  echo foo[0].symbol.getImpl.treerepr
  # echo foo[0].symbol.kind # fails

checkImpl(a)

# Prefix
#   Sym "@"
#   Bracket
#   IntLit 12345