vendor mempool packages and wire mempool module to vendored pkgs

Co-authored-by: naturallaw777 <99053422+naturallaw777@users.noreply.github.com>

packages/mempool/frontend-assets-fetch.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Fetch hash-locked versions of assets that are dynamically fetched via
+# https://github.com/mempool/mempool/blob/master/frontend/sync-assets.js
+# when running `npm run build` in the frontend.
+#
+# This file is updated by ./frontend-assets-update.sh
+
+declare -A revs=(
+    ["mempool/mining-pool-logos"]=53972ebbd08373cf4910cbb3e6421a1f3bba4563
+)
+
+fetchFile() {
+    repo=$1
+    file=$2
+    rev=${revs["$repo"]}
+    curl -fsS "https://raw.githubusercontent.com/$repo/$rev/$file"
+}
+
+fetchRepo() {
+    repo=$1
+    rev=${revs["$repo"]}
+    curl -fsSL "https://github.com/$repo/archive/$rev.tar.gz"
+}
+
+mkdir mining-pools
+fetchRepo "mempool/mining-pool-logos" | tar xz --strip-components=1 -C mining-pools