Add a new `picoclaw migrate` CLI command that detects an existing OpenClaw
installation and migrates workspace files and configuration to PicoClaw.
Workspace markdown files (SOUL.md, AGENTS.md, USER.md, TOOLS.md, HEARTBEAT.md,
memory/, skills/) are copied 1:1. Config keys are mapped from OpenClaw's
camelCase JSON format to PicoClaw's snake_case format with provider and channel
field mapping.
Supports --dry-run, --refresh, --config-only, --workspace-only, --force flags.
Existing PicoClaw files are never silently overwritten; backups are created.
Closes#27
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
