Generate IPLD blocks table and related GQL API (#260)

* Add ipld-blocks entity generation

* Populate ipld-blocks table

* Rename ipld-block entity and update after each event

* Move ipld-hook to hooks.ts

* Change IPLD block structure

* Add cid field in blocks

* Fetch prev. IPLDBlock for a contract

* GQL API to query IPLDBlock by CID

* Save cid in blocks in existing watchers

* Update codegen docs

* GQL API for getting last derived state (#3)

* GQL API for getting last derived state

* Rename query to getState

* Change query names to getState and getStateByCid

* Save BigInt as string

* Move function to prepare IPLDBlock to indexer

* Refactor IPLDBlock hook

* Add genesis hook

* Call post-block hook after a block is marked as complete

* Add IPLDBlock checkpointing

* Use queryRunner instead of a new repo for queries

* Add a query to get block in ipld-eth-client

* Get latest checkpoints for all contracts for checkpointing.

* Call post-block hook in a queue

* Pass server config to Indexer in watch-contract cli

Co-authored-by: nikugogoi <nabarun@deepstacksoft.com>

packages/codegen/package.json

@@ -21,6 +21,7 @@
   "dependencies": {
     "@poanet/solidity-flattener": "https://github.com/vulcanize/solidity-flattener.git",
     "@solidity-parser/parser": "^0.13.2",
+    "@vulcanize/util": "^0.1.0",
     "gql-generator": "https://github.com/vulcanize/gql-generator.git",
     "graphql": "^15.5.0",
     "graphql-compose": "^9.0.3",