test/wcc/data: grow the declarative compiler corpus to 1,224 fixtures

The r-prefixed waves absorb the runtime, reject, and byte-compare rows
of the migrated native carriers; each fixture is one directory with one
case.ww and a //ww:error, //ww:compile, //ww:run, or //ww:run-exit
directive covering both frontends.

test/wcc/data/r989_cata_break_continue_control/case.ww

@@ -0,0 +1,11 @@
+//ww:run-exit 5
+package main;
+export fn main() i32 = {
+	let i: i32 = 0;
+	for (i < 10) {
+		i = i + 1;
+		if (i == 3) { continue; };
+		if (i == 5) { break; };
+	};
+	return i;
+};