chore: publish v0.4.2 — fix workspace deps, remove publish.sh

- workspace:* → workspace:^ (resolves to ^x.y.z instead of exact)
- Remove publish.sh, use changesets workflow
- changeset config: access public (Gitea compat)
- release script: build + test + changeset publish

packages/workflow-agent-react/CHANGELOG.md

@@ -1,5 +1,15 @@
 # @uncaged/workflow-agent-react
 
+## 0.4.2
+
+### Patch Changes
+
+- Fix workspace dependency resolution: use workspace:^ so published packages resolve to compatible versions instead of exact (non-existent) versions.
+- Updated dependencies
+  - @uncaged/workflow-protocol@0.4.2
+  - @uncaged/workflow-reactor@0.4.2
+  - @uncaged/workflow-util-agent@0.4.2
+
 ## 0.4.0
 
 ### Minor Changes