Add search command, history browser, install script, and systemd timers

- /search command to search across memory, history, and configuration
- history-browser.py for browsing and analyzing session history
- install.sh for first-time setup with directory creation and validation
- daily-maintenance.sh for scheduled backup, cleanup, and validation
- systemd timer units for automated daily maintenance at 6 AM
- Updated shell completions with 11 aliases
- Test suite now covers 19 tests
- Bump version to 1.1.0

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

commands/README.md

@@ -14,6 +14,7 @@ Slash commands for quick actions. User-invoked (type `/command` to trigger).
 | `/summarize` | `/save-session` | Summarize and save session to memory |
 | `/remember` | `/save`, `/note` | Quick save to memory |
 | `/config` | `/settings`, `/prefs` | View/manage configuration |
+| `/search` | `/find`, `/lookup` | Search memory, history, config |
 | `/maintain` | `/maintenance`, `/admin` | Configuration maintenance |
 | `/programmer` | | Code development tasks |
 | `/gcal` | `/calendar`, `/cal` | Google Calendar access |