Preview Guard for Jade

0.1.0-alpha.1 — Initial alpha

- Adds a fallback for oversized Jade block-container previews.
- Simplifies preview display data while preserving actual inventory contents and item components.
- Shows notices when preview information is simplified, shortened, or unavailable.
- Leaves normal previews unchanged and respects Jade’s container-access checks and packet-size guard.
- Adds configurable preview limits.

Compatibility:
Minecraft 1.21.1, Fabric Loader 0.16.14, Java 21, Fabric API 0.116.6+1.21.1, and Jade 15.10.6+fabric. Install on both client and server.

Verification:
Passed 17 Minecraft TestServer integration tests and 15 configuration/client-registration assertions, following two upstream baseline tests. Graphical gameplay, real networked multiplayer, full world restart, and broader modpack compatibility remain unverified.

Scope:
Block-container previews only. Entity inventories, including chest minecarts, are outside this release.