feat(coding-agent/core): added depth-controlled search and path utilities

- Added maxdepth and mindepth parameters to find function for depth-controlled file search.
- Added counter function to count occurrences and sort by frequency.
- Added basenames function to extract base names from paths.
- Fixed biome.json configuration to remove invalid double negation pattern.

biome.json

@@ -35,19 +35,14 @@
 	"files": {
 		"includes": [
 			"packages/*/src/**/*.ts",
-			"!**/vendor/**/*",
 			"packages/*/test/**/*.ts",
 			"packages/coding-agent/examples/**/*.ts",
-			"packages/web-ui/src/**/*.ts",
-			"packages/web-ui/example/**/*.ts",
+			"!**/vendor/**/*",
 			"!**/node_modules/**/*",
 			"!**/test-sessions.ts",
 			"!**/models.generated.ts",
 			"!**/template.generated.ts",
-			"!**/gen/agent_pb.ts",
-			"!packages/web-ui/src/app.css",
-			"!packages/mom/data/**/*",
-			"!!**/node_modules"
+			"!**/gen/agent_pb.ts"
 		]
 	},
 	"assist": { "actions": { "source": { "organizeImports": "on" } } }