Allows for iterating over the kvs when constructing with a list literal instead of having to create a separate array to pass into ComptimeStringMap in order to maintain access to the values.
For example when making a set, before in order to loop over the kvs you'd have to do something like:
const MyKV = struct { @"0": []const u8 };
const kvs: []const MyKV = &[_]MyKV{ .{ @"0" = "foo"}, .{ @"0" = "bar" } };
const map = ComptimeStringMap(void, kvs);
for (kvs) |kv| {}
whereas now it's possible to do:
const map = ComptimeStringMap(void, .{ .{"foo"}, .{"bar"} });
for (map.kvs) |kv| {}
