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/r769_dot_aliased_ptr_double_alias/case.ww

@@ -0,0 +1,10 @@
+//ww:run-exit 42
+package main;
+type vt = struct { field: i32 };
+type pvt = *vt;
+type vs = pvt;
+export fn main() i32 = {
+	let v: vt; v.field = 42;
+	let s: vs = (&v): vs;
+	return s.field;
+};