Add smart retrieval with git context (Milestone 10)

- Git context extraction: branch, commits, modified files
- Smart search with context-based re-ranking
- Time boosting for recently accessed nodes
- File relevance boosting for modified files
- Branch keyword matching
- CLI: smart-search, ss, what, now commands
- MCP tools: memory_smart_search, memory_what

src/cli/index.ts

@@ -23,6 +23,7 @@ import { exportCommand, vizCommand } from './commands/export';
 import { importCommand } from './commands/import';
 import { backupCommand, restoreDbCommand, listBackupsCommand } from './commands/backup-cmd';
 import { graphsCommand, useCommand, initCommand } from './commands/graphs';
+import { smartSearchCommand, ssCommand, whatCommand, contextAwareCommand } from './commands/smart';
 import { closeDb } from '../core/db';
 import { migrateOldDatabase } from '../core/db';
 
@@ -67,6 +68,10 @@ program.addCommand(listBackupsCommand);
 program.addCommand(graphsCommand);
 program.addCommand(useCommand);
 program.addCommand(initCommand);
+program.addCommand(smartSearchCommand);
+program.addCommand(ssCommand);
+program.addCommand(whatCommand);
+program.addCommand(contextAwareCommand);
 
 // Check for old database migration
 migrateOldDatabase();