feat: implement intelligent scan command with ast-grep integration

- Add comprehensive project scanning with 4-phase analysis
- Integrate @ast-grep/cli for advanced syntax tree analysis
- Support AI-powered project understanding with fallback
- Generate structured JSON output with file/directory summaries
- Add configurable include/exclude patterns and scan depth
- Provide transparent logging for each analysis phase
- Create task-master scan command with full CLI options

This addresses issue #78 by enabling quick project structure analysis
for easier Task Master adoption on existing projects.

Co-authored-by: Ralph Khreish <Crunchyman-ralph@users.noreply.github.com>

scripts/modules/task-manager/scan-project/index.js

@@ -0,0 +1,3 @@
+// Main entry point for scan-project module
+export { default } from './scan-project.js';
+export { default as scanProject } from './scan-project.js';