add Layer 2 JRPG component system Add reusable content and window modals, an isolated component sandbox, shared cyberpunk scroll areas, production-safe cache freshness, and server-rendered JRPG panel state. Co-authored-by: Copilot <[email protected]>

# config

Shared Bazel build configurations and platform definitions.

## Usage

Reference in BUILD files:

```starlark
load("//config:defs.bzl", ...)
```