add config.json to boards for auto building

main/boards/m5stack-core-s3/config.json

@@ -0,0 +1,11 @@
+{
+    "target": "esp32s3",
+    "builds": [
+        {
+            "name": "m5stack-core-s3",
+            "sdkconfig_append": [
+                "CONFIG_SPIRAM_MODE_QUAD=y"
+            ]
+        }
+    ]
+}