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>

package.json

@@ -53,6 +53,7 @@
 	"license": "MIT WITH Commons-Clause",
 	"dependencies": {
 		"@ai-sdk/amazon-bedrock": "^2.2.9",
+		"@ast-grep/cli": "^0.29.0",
 		"@ai-sdk/anthropic": "^1.2.10",
 		"@ai-sdk/azure": "^1.3.17",
 		"@ai-sdk/google": "^1.2.13",