fix(release): make README.md / CHANGELOG.md optional in archive bundling

[aksOps]

Summary

`.goreleaser.yml` had bare filename entries (`README.md`, `CHANGELOG.md`) in the archive `files:` block. Goreleaser treats those as required — globbing hard-fails when the file is absent:

```
globbing failed for pattern README.md: matching "./README.md":
file does not exist
```

That bit the v0.4.2 release attempt (PR #168 wiped the docs ahead of a clean reference-docs rewrite). Both `release-go` and `release-darwin` failed, no release was created.

Fix

Switch each bare filename to a glob:

```yaml
files:

• LICENSE*
• README.md* # was: README.md
• CHANGELOG.md* # was: CHANGELOG.md
  ```

Goreleaser silently skips patterns that match zero files. The trailing `*` matches the file when present (post new-docs land) and nothing when absent — graceful in both states.

No behavior change once a README/CHANGELOG returns. `LICENSE*` already used this pattern; just bringing the other two into line.

`release-darwin.yml` already wraps its `cp` commands in `|| true` so it was unaffected — only goreleaser-side bundling broke.

Test plan

• YAML parses (`python3 -c "import yaml; yaml.safe_load(...)"`)
• Functional: after merge, re-tag v0.4.2 — release should succeed with archives containing only `codeiq` + `LICENSE` (no README/CHANGELOG until they're rewritten)

🤖 Generated with Claude Code