Make or_else and or_return operators (binary and suffix respectively)

core/os/os2/errors.odin

@@ -57,7 +57,7 @@ link_error_delete :: proc(lerr: Maybe(Link_Error)) {
 
 
 is_platform_error :: proc(ferr: Error) -> (err: i32, ok: bool) {
-	v := or_else(ferr.(Platform_Error), {});
+	v := ferr.(Platform_Error) or_else {};
 	return v.err, v.err != 0;
 }
 

core/os/os2/file_stream.odin

@@ -13,7 +13,7 @@ error_to_io_error :: proc(ferr: Error) -> io.Error {
 	if ferr == nil {
 		return .None;
 	}
-	return or_else(ferr.(io.Error), .Unknown);
+	return ferr.(io.Error) or_else .Unknown;
 }