Changes:
- #2341: Store Copilot CLI sessions storage file name in workspace state
- #2330: edits: enable gemini 3 replace string
- #2339: Update branding for Copilot CLI
- #2337: Update CLI branding
- #2338: Disable image attachments for CLI
- #2336: Log additional error details
- #2332: Fix hiding of non-workspace specific Background Agent Sessions
- #2334: Add last error telemetry
- #2195: update gpt51CodexPrompt as suggested by openAI
- #2325: nes: support /models on proxy and model picker