Initial commit: Pezkuwi SubQuery indexer

- pezkuwi.yaml: Relay chain staking indexer (rewards, slashes, pools, transfers, era info)
- pezkuwi-assethub.yaml: Asset Hub indexer (NominationPools, asset transfers)
- GraphQL schema for staking data entities
- Handler mappings from Nova SubQuery base

scripts/clear_folders.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+SCRIPT_PATH=$(dirname "$0")
+MAIN_DIRECTORY=${SCRIPT_PATH%/*}
+
+folders=($(ls ${MAIN_DIRECTORY}/networks))
+
+for item in ${folders[*]}
+do
+  printf "   %s\n" $item
+  if [ -d "${MAIN_DIRECTORY}/networks/$item/src" ]; then
+  rm -r ${MAIN_DIRECTORY}/networks/$item/src
+  rm ${MAIN_DIRECTORY}/networks/$item/tsconfig.json
+  rm ${MAIN_DIRECTORY}/networks/$item/schema.graphql
+  rm ${MAIN_DIRECTORY}/networks/$item/local-runner.sh
+  rm ${MAIN_DIRECTORY}/networks/$item/docker-compose.yml
+  fi
+
+  if [ -d "${MAIN_DIRECTORY}/networks/$item/node_modules" ]; then
+  rm -r ${MAIN_DIRECTORY}/networks/$item/node_modules
+  fi
+
+  if [ -d "${MAIN_DIRECTORY}/networks/$item/dist" ]; then
+  rm -r ${MAIN_DIRECTORY}/networks/$item/dist
+  fi
+
+  if [ -d "${MAIN_DIRECTORY}/networks/$item/.data" ]; then
+  rm -r ${MAIN_DIRECTORY}/networks/$item/.data
+  fi
+
+  if [ -f "${MAIN_DIRECTORY}/networks/$item/yarn.lock" ]; then
+  rm ${MAIN_DIRECTORY}/networks/$item/yarn.lock
+  fi
+done
+
+printf "Done !"