Release v1.42.0

[omriariav]

Summary

• Bump the CLI and bundled Claude/Codex plugin manifests to v1.42.0.
• Document Slides command validation, task reopening, and opt-in session hooks.

Included issues

Closes #186
Closes #187
Closes #205
Closes #206
Closes #207

Verification

• PATH-pinned golangci-lint v2.12.2 make ci
• make test-race
• make release-check
• git diff --check

[github-actions]

Summary

This release PR bumps gws from v1.41.0 to v1.42.0 and updates release notes, plugin manifests, tests, and CLAUDE.md command documentation.

What looks good

• Version numbers are consistent across changed manifests, Makefile, tests, and documentation.
• Release notes accurately summarize the already-merged features and link relevant issues.
• Newly documented commands match existing implementations.
• git diff --check passes.
• No credentials, unsafe inputs, or command behavior changes are introduced.

Issues found

None. The PR is clean and ready to merge.

Testing note: go test ./cmd/... could not run because the read-only environment prevented Go from creating its module cache.