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/r701_field_global_call/case.ww

@@ -0,0 +1,11 @@
+//ww:run-exit 250
+package main;
+type inner = struct { a: i64, b: i64 };
+type outer = struct { i: inner, t: i64 };
+let g: outer;
+fn mki() inner = { return inner { a = 70i64, b = 80i64 }; };
+fn main() i32 = {
+	g.t = 100i64;
+	g.i = mki();
+	return (g.i.a + g.i.b + g.t): i32;
+};