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>

compose_registry.json

@@ -1,4 +1,22 @@
 [
+  {
+    "chain": "mainnet",
+    "client": "geth",
+    "compose_file": "abcore/geth/abcore-mainnet-geth-pruned-pebble-path",
+    "drpc_chain": "abcore",
+    "features": [
+      "path",
+      "pebble"
+    ],
+    "network": "abcore",
+    "node": null,
+    "relay": null,
+    "stack": null,
+    "type": "pruned",
+    "volumes": [
+      "abcore-mainnet-geth-pruned-pebble-path"
+    ]
+  },
   {
     "chain": "mainnet",
     "client": "external-node",