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/r766_star_fn_deref_args/case.ww

@@ -0,0 +1,8 @@
+//ww:run-exit 15
+package main;
+fn many(a: i32, b: i32, p: *i32) i32 = { return a + b + *p; };
+export fn main() i32 = {
+	let z: i32 = 5;
+	let f: *fn(a: i32, b: i32, p: *i32) i32 = &many;
+	return (*f)(3, 7, &z);
+};