chore(release): publish @opencanva/core@0.3.0 and create-opencanva@0.3.0

[daniellee-ux]

Summary

Version-bump commit for the release already published to npm:

• @opencanva/core: 0.2.0 → 0.3.0 (minor — three feature-level changes since last release: vibe-based style clarification + generated theme catalog from Vibe-based style clarification + generated theme catalog #8/Group layers by board, zoom-to-board navigation, and all-boards export #9, and the Illustration primitive + svg-illustration skill from feat(core): Illustration primitive + svg-illustration skill #10)
• create-opencanva: 0.2.0 → 0.3.0, dependency on @opencanva/core bumped to ^0.3.0 to match, per the established publish order (core published first, wrapper pinned to it second)

Both packages are confirmed live:

$ npm view @opencanva/core version
0.3.0
$ npm view create-opencanva version
0.3.0
$ npm view create-opencanva dependencies
{ '@opencanva/core': '^0.3.0' }

This PR just brings the repo's committed version numbers in sync with what's already published — no functional changes.

🤖 Generated with Claude Code

[daniellee-ux]

Codex review (codex exec review --base main, codex-cli 0.139.0) verdict:

The changes are limited to consistent package version and dependency range bumps, with the lockfile updated accordingly. I did not identify any actionable regressions introduced by this patch.

No actionable findings — merging as-is.