creeper rwr mod

• Adds a client-side radar-style HUD that lists nearby creepers with their direction (relative to where you are facing) and distance. Entries turn yellow for lock range and red for the closest “missile” danger range.
• Plays two-stage audio pings inspired by an RWR: a slower beep when a creeper is within lock distance and a faster, higher-pitched beep when one is in the missile range. Pitch and volume scale slightly as a creeper gets closer.
• Default gates (all configurable): 48m max display range, 28m lock/sound start, 14m missile/second-stage.
• Configuration lives in config/creeperrwr.json and is created automatically with sane defaults; lock distance is clamped to the max gate and missile distance is clamped to the lock gate.
• HUD shows at most eight closest creepers and summarizes any extras to avoid clutter; it also shows the current gate values on-screen.
• Works entirely on the client; no server installation needed. Suggested improvement: add an in-game config screen for quick tuning without editing the JSON.