compiler/willow/unittest/IR, branch ir-rework

compiler/willow/unittest/IR, branch ir-rework compiler stuff monorepo [willow]: initial IRBuilder API (#9) 2026-02-19T18:13:41+00:00 Stefan Weigl-Bosker stefan@s00.xyz 2026-02-19T18:13:41+00:00 1fd2d6d88f5f78d879bf38bb3fba7fa2e749d3b0 - add IRBuilder api - remove `name` field from `Value` - fix some bugs in IList interface - more verifier tests

- add IRBuilder api
- remove `name` field from `Value`
- fix some bugs in IList interface
- more verifier tests