- ensure concats and repeats stay unsigned
- defer unbased-unsized conversion to enable cast semantics
- disable inaccurate folding of binary operations of based numbers
- fix typeof and size cast binop signedness logic
- fix typeof $unsigned and $signed
- test harness allows production of `integer unsigned`

- cast functions in separate scopes are no longer omitted or removed
- package item reordering excludes locally declared names
- test runner ensures output is stable after first iteration

- dimensions flattening conversion only flattens packed dimensions
- conversion for packing arrays when necessary (preserves memories)
- added coverage for array with multiple packed dimensions
- test runner no longer forbids multi-dim accesses after conversion
- Decl and subordinate types derive Ord