Cline v3.81.0 adds GPT-5.5 support and memory diagnostics

Cline `v3.81.0` ships three changes: GPT-5.5 model support is now available for OpenAI Codex subscription users, a fix removes hardcoded "What's New" fallback items from the webview so only remotely configured welcome banners are displayed, and memory diagnostics in `cline-core` have been improved. The diagnostics enhancements include near-heap-limit heap snapshots, periodic memory usage logging, and logging of discovered heap snapshots on abnormal exits to aid out-of-memory debugging.