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/r949_intbinop_alias_vs_base/case.ww

@@ -0,0 +1,9 @@
+//ww:run
+package main;
+type myint = i32;
+export fn main() i32 = {
+	let a: myint = 1: myint;
+	let b: i32 = 2;
+	if (a < b) { return 0; };
+	return 0;
+};