fix: Update test snapshots and resolve compatibility issues

- Update all test snapshots to match Biome formatting standards
- Fix getter return types in DocTestController (unknown -> {} | undefined)
- Replace Object.hasOwn with Object.prototype.hasOwnProperty.call for Node.js compatibility
- All tests now pass with Biome formatting

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: azu

packages/@power-doctest/tester/test/snapshots/error.array/output.json

@@ -1,6 +1,6 @@
 [
-	{
-		"status": "rejected",
-		"message": "AssertionError"
-	}
-]
+    {
+        "status": "rejected",
+        "message": "AssertionError"
+    }
+]

packages/@power-doctest/tester/test/snapshots/error.async/output.json

@@ -1,6 +1,6 @@
 [
-	{
-		"status": "rejected",
-		"message": "AssertionError"
-	}
-]
+    {
+        "status": "rejected",
+        "message": "AssertionError"
+    }
+]

packages/@power-doctest/tester/test/snapshots/error.object/output.json

@@ -1,6 +1,6 @@
 [
-	{
-		"status": "rejected",
-		"message": "AssertionError"
-	}
-]
+    {
+        "status": "rejected",
+        "message": "AssertionError"
+    }
+]

packages/@power-doctest/tester/test/snapshots/ok.array/output.json

@@ -1,5 +1,5 @@
 [
-	{
-		"status": "fulfilled"
-	}
-]
+    {
+        "status": "fulfilled"
+    }
+]

packages/@power-doctest/tester/test/snapshots/ok.no-assert/output.json

@@ -1,5 +1,5 @@
 [
-	{
-		"status": "fulfilled"
-	}
-]
+    {
+        "status": "fulfilled"
+    }
+]

packages/@power-doctest/tester/test/snapshots/ok.private-field/output.json

@@ -1,5 +1,5 @@
 [
-	{
-		"status": "fulfilled"
-	}
-]
+    {
+        "status": "fulfilled"
+    }
+]