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

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

automation/systemd/claude-maintenance.timer

@@ -0,0 +1,11 @@
+[Unit]
+Description=Daily Claude Code Maintenance Timer
+Requires=claude-maintenance.service
+
+[Timer]
+OnCalendar=*-*-* 06:00:00
+Persistent=true
+RandomizedDelaySec=300
+
+[Install]
+WantedBy=timers.target