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/r690_amp_dot_ptr_field/case.ww

@@ -0,0 +1,8 @@
+//ww:run-exit 55
+package main;
+type pt = struct { x: i32, y: i32 };
+fn main() i32 = {
+	let o: pt; o.x = 0; o.y = 0;
+	let p: *pt = &o; let q: *i32 = &p.y; *q = 55;
+	return o.y;
+};