Initial commit: jackpotminer Equihash 192,7 miner

GPU-accelerated Equihash 192,7 miner in Rust with three solver backends:
- CPU: Wagner's algorithm, AVX2 packed slots (xenoncat-style)
- OpenCL: full on-GPU solve (kernels/equihash.cl); runs on NVIDIA and AMD
- CUDA: driver-API replay of miniZ's extracted fatbin (src/miniz/)

Also includes a default-off pearlhash backend (src/pearl/, native CPU core +
NVRTC int8-GEMM GPU kernels) and a WIP Ethash CUDA backend (src/ethash/).

Reverse-engineering scratch (alpha-miner, pearl-dump/) and the active runtime
config (mine.toml) are gitignored; mine.example.toml is the template.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

run-jackpotminer.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Double-click / .desktop launcher: runs jackpotminer with the mine.toml next to
+# it and keeps the terminal window open afterwards so output/errors are readable.
+cd "$(dirname "$(readlink -f "$0")")" || exit 1
+
+bin="./target/release/jackpotminer"
+if [ ! -x "$bin" ]; then
+    echo "jackpotminer is not built yet. Run:  cargo build --release"
+elif [ ! -f mine.toml ]; then
+    echo "No mine.toml found. Copy mine.example.toml to mine.toml and set your"
+    echo "pool URL + wallet, then double-click again."
+else
+    "$bin" --config mine.toml "$@"
+    status=$?
+    echo
+    echo "jackpotminer exited (code $status)."
+fi
+
+echo
+read -n1 -rsp "Press any key to close this window..."
+echo