Adds 'hermes memory setup' interactive wizard and 'hermes memory status'
command. Auto-detects installed memory plugins via the plugin system.
Setup flow:
1. Lists available providers (auto-detected from plugins)
2. User picks one (or built-in only)
3. Walks through provider's config schema (get_config_schema())
4. Writes non-secrets to config.yaml under memory.<name>
5. Writes secrets (API keys) to .env
6. Sets memory.provider in config.yaml
Status shows: current provider, config values, plugin availability,
missing credentials with URLs to get them.
Also adds get_config_schema() to MemoryProvider ABC and implements
it for all 6 providers with their specific config fields.
Teknium
229be62098