Improve golang support, moving lists to talon-list

[alexander-clarke]

I seperated the user.code_keyword and the user.code_type lists into talon-list files.
I added a missing keyword (var).
I fixed the types list, which seemed to be built from a copy of the C types, however not all of those types exist in go
I also added the user.code_keywords tag so that the previously defined keywords could actually be used in go

[alexander-clarke]

I've now added a capture to do int, complex and float different bit widths
I could make int uint uintptr as part of the int capture? But also works as is.