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/r832_tuple_nested_array_overlong/case.ww

@@ -0,0 +1,6 @@
+//ww:error "tuple element must be a scalar"
+package main;
+export fn main() i32 = {
+	let t: ([2][3]int, i32) = ([[1, 2, 3], [4, 5, 6], [7, 8, 9]], 5);
+	return t.0[0][0]: i32;
+};