jsdom,builtin: add all methods for DOMMatrix; add conversion methods to convet from/to JS types (#12395)

vlib/builtin/js/builtin.js.v

@@ -104,3 +104,66 @@ pub fn (f float_literal) str() string {
 
 	return res
 }
+
+pub fn tof64(n JS.Number) f64 {
+	res := f64(0.0)
+	#res.val = n;
+
+	return res
+}
+
+pub fn tof32(n JS.Number) f32 {
+	res := f32(0.0)
+	#res.val = n;
+
+	return res
+}
+
+pub fn toi(n JS.Number) int {
+	res := int(0)
+	#res.val = Math.floor(n);
+
+	return res
+}
+
+pub fn f64tonum(n f64) JS.Number {
+	mut res := JS.Number{}
+	#res = n.val;
+
+	return res
+}
+
+pub fn itonum(n int) JS.Number {
+	mut res := JS.Number{}
+	#res = n.val;
+
+	return res
+}
+
+pub fn i64tobigint(n i64) JS.BigInt {
+	mut res := JS.BigInt{}
+	#res = n.val;
+
+	return res
+}
+
+pub fn u64tobigint(n u64) JS.BigInt {
+	mut res := JS.BigInt{}
+	#res = n.val;
+
+	return res
+}
+
+pub fn tobool(b JS.Boolean) bool {
+	res := false
+	#res.val = b;
+
+	return res
+}
+
+pub fn booltojs(b bool) JS.Boolean {
+	mut res := JS.Boolean{}
+	#res = b.val;
+
+	return res
+}