fix(ai-providers): change generateObject mode from 'tool' to 'auto' for better provider compatibility

Fixes Perplexity research role failing with 'tool-mode object generation' error

The hardcoded 'tool' mode was incompatible with providers like Perplexity that support structured JSON output but not function calling/tool use

Using 'auto' mode allows the AI SDK to choose the best approach for each provider

package-lock.json

@@ -1,12 +1,12 @@
 {
 	"name": "task-master-ai",
-	"version": "0.16.1",
+	"version": "0.16.2-rc.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "task-master-ai",
-			"version": "0.16.1",
+			"version": "0.16.2-rc.0",
 			"license": "MIT WITH Commons-Clause",
 			"dependencies": {
 				"@ai-sdk/amazon-bedrock": "^2.2.9",