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/r930_free_field/case.ww

@@ -0,0 +1,11 @@
+//ww:run
+// Runtime half of 930_free_noop_run.c free_struct_field.
+package main;
+type holder = struct { p: *i32, n: i32 };
+export fn main() i32 = {
+	let x: i32 = 3;
+	let h: holder = holder { p = &x, n = 4 };
+	free(h.p);
+	if (h.n != 4) { return 2; };
+	return 0;
+};