v0.1.2-rc.1

What's Changed

• feat: rust kernel sidecar by @NathanFlurry in #1430
• chore: module loading perf by @NathanFlurry in #1433
• feat: re-implement pyodide in Rust kernel by @NathanFlurry in #1434
• chore: rust kernel hardening & feature parity by @NathanFlurry in #1435
• Runtime isolation hardening + test quality by @NathanFlurry in #1437
• chore: finish ts rust migration by @NathanFlurry in #1442
• fix: pin ghostty-web SHA in opencode build to preserve frozen-lockfile by @abcxff in #1458

Full Changelog: v0.1.1...v0.1.2-rc.1