Magpie Setup Shared Config Sync

apache/magpie-setup-shared-config-sync

| Commit + push the user's shared Claude config to the `~/.claude-config` private dotfile-style sync repo. Inspects for uncommitted local edits and unpushed commits, drafts a commit message, and after explicit approval commits and pushes. Runs `git pull --rebase` first if the local checkout is behind, so a push never overwrites concurrent work from clones the default private remote if it exists, or creates a new private remote + scaffolds the minimal layout if it does not. Never force-pushes; never rewrites already-pushed history; never creates a public remote; never modifies files outside `~/.claude-config/` (except the confirmed fresh-host symlink wiring into `~/.claude/`).