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/r650_ptr_3deep/case.ww

@@ -0,0 +1,8 @@
+//ww:run-exit 9
+package main;
+type a3 = struct { x: i32 };
+type a2 = struct { a: a3 };
+type a1 = struct { a: a2 };
+fn put(p: *a1) void = { p.a.a.x = 9; };
+fn get(p: *a1) i32 = { return p.a.a.x; };
+fn main() i32 = { let v: a1; v.a.a.x = 0; put(&v); return get(&v); };