PTY resize crash hardened; invalid editor no longer spams

What's Changed

• fix(core): harden PTY resize against native crashes by @scidomino in https://github.com/google-gemini/gemini-cli/pull/27496
• Changelog for v0.45.0-preview.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/27495
• Changelog for v0.44.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/27569
• fix(cli): prevent spam loop when preferredEditor is invalid by @Niralisj in https://github.com/google-gemini/gemini-cli/pull/25324
• Adding quote by @scidomino in https://github.com/google-gemini/gemini-cli/pull/27571
• Transition to flash GA model when experiment flag is present. by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27570
• chore(ci): add optimized PR size labeler and batch workflows by @sripasg in https://github.com/google-gemini/gemini-cli/pull/27616
• fix(ci): use pull_request_target trigger to grant write access on fork PRs by @sripasg in https://github.com/google-gemini/gemini-cli/pull/27637

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.45.0-preview.1...v0.46.0-preview.0