Decide whether there should be syntax for literal string concatenation

[robertmuth]

In C adjacent strings are automatically concatenated.

So printf("hello " "world!") is the same as printf("hello world!")

In Cwerg we do not have this yet.

Example where it would be useful:

let complex_escape_sequence = "\x1b[" "34" ";" "2" "m"

It would be even nicer if this also worked for global constant strings/arrays, e.g.:

let complex_escape_sequence = fmt\SGR_START fmt\SGR_ FG_BLUR ";" fmt\SGR_DIM fmt\SGR_END

this will not parse and we probably need to intruduce an operator, e.g.

let complex_escape_sequence = fmt\SGR_START + fmt\SGR_ FG_BLUR + ";" + fmt\SGR_DIM + fmt\SGR_END

[robertmuth]

The scope couldd be widened to vector concatenation, e.g,

let v2 = "aa"
let v3 = {[3]u8: 1, 2, 3}
let v5 = v2 ++ v3