Add ~/.config/poc-memory/config.toml for user_name, assistant_name,
data_dir, projects_dir, and core_nodes. All agent prompts and
transcript parsing now use configured names instead of hardcoded
personal references.
`poc-memory daemon install` writes the systemd user service and
installs the memory-search hook into Claude's settings.json.
Scrubbed hardcoded names from code and docs.
Authors: ProofOfConcept <poc@bcachefs.org> and Kent Overstreet
