encoding/cbor: support simd vectors

tests/core/encoding/cbor/test_core_cbor.odin

@@ -44,6 +44,7 @@ Foo :: struct {
 	smallest: big.Int,
 	ignore_this: ^Foo `cbor:"-"`,
 	mat: matrix[4, 4]f32,
+	vec: #simd [4]f64,
 }
 
 FooBar :: enum {
@@ -97,6 +98,7 @@ test_marshalling :: proc(t: ^testing.T) {
 			small_onetwenty = -i128(max(u64)),
 			ignore_this = &Foo{},
 			mat = 1,
+			vec = 2,
 		}
 
 		big.atoi(&f.biggest, "1234567891011121314151617181920")
@@ -145,6 +147,12 @@ test_marshalling :: proc(t: ^testing.T) {
 	"now": 1(1701117968),
 	"pos": 1212,
 	"str": "Hellope",
+	"vec": [
+		2.0000,
+		2.0000,
+		2.0000,
+		2.0000
+	],
 	"yes": true,
 	"comp": [
 		32.0000,