Auto-allow permissions on session start

[rafaellabarrocas]

Describe the feature or problem you'd like to solve

Add a persistent setting to automatically run /allow-all when starting a new session.

Proposed solution

Suggested implementation:

• Add a setting like permissions.auto_allow_all: true (configurable via /settings)
• Or add a startup preference in ~/.copilot/config

Example prompts or workflows

I work in trusted directories and need to run /allow-all at the start of every session. Having to manually enable permissions each time creates friction in the workflow.

Additional context

Same as Claude's bypass permissions toggle.