feat(schema): add cache-dir property to taskrc schema (#2603)

Author: vmaerten

website/src/public/schema-taskrc.json

@@ -43,6 +43,10 @@
           "description": "Expiry duration for cached remote Taskfiles (e.g., '1h', '24h')",
           "pattern": "^[0-9]+(ns|us|µs|ms|s|m|h)$"
         },
+        "cache-dir": {
+          "type": "string",
+          "description": "Directory to cache remote Taskfiles"
+        },
         "trusted-hosts": {
           "type": "array",
           "description": "List of trusted hosts for remote Taskfiles (e.g., 'github.com', 'gitlab.com', 'example.com:8080').",