Add abcore mainnet node profile (chain-id 36888)

- Add abcore.Dockerfile for geth-fork binary download from ABFoundationGlobal/abcore
- Add scripts/init.sh for geth initialization with genesis.json and config.toml
- Add generated compose file abcore-mainnet-geth-pruned-pebble-path.yml
- Update compose_registry.json with new entry

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

abcore/scripts/init.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e  # Exit on failure
+
+GETH_DATA_DIR="/root/.ethereum"
+CONFIG_FILE="/config/config.toml"
+GENESIS_FILE="/config/genesis.json"
+
+# Initialize geth from genesis if data directory is empty
+if [ -z "$(ls -A "$GETH_DATA_DIR")" ]; then
+    echo "abcore: data directory is empty, initializing from genesis..."
+    if [ -f "$GENESIS_FILE" ]; then
+        /abcore/bin/geth init --datadir "$GETH_DATA_DIR" "$GENESIS_FILE"
+    else
+        echo "abcore: genesis file not found at $GENESIS_FILE" >&2
+        exit 1
+    fi
+else
+    echo "abcore: data directory not empty, continuing..."
+fi
+
+exec /abcore/bin/geth --config "$CONFIG_FILE" --datadir "$GETH_DATA_DIR" "$@"