V0.11.11

[pouya-eghbali]

• Add GraphQL
• Add null checks for WS client

[what-the-diff]

PR Summary

• Added new dependencies: Multiple new packages have been introduced to the system to aid the program's operations.
• Version update: The Version constant in 'constants.go' file has been updated from '0.11.10' to '0.11.11'.
• Data type changes: Changes have been made to replace the 'math/big' type with a new 'helpers.BigInt' type in 'assetprice.go' and 'assetprice/where.go', improving efficiency. Additional updates were made in 'ent/assetprice_create.go', 'ent/assetprice_query.go' and related files to support these changes.
• New import: An import for 'github.com/KenshiTech/unchained/gql' has been added to 'cmd/broker.go'.
• Enhancements to AssetPrice: In 'assetprice/assetprice.go', totalCount and namedSigners properties have been added to the AssetPriceEdges. New methods 'assignValues' and 'scanValues' are also introduced to the AssetPrice type.
• Updates in ent/assetprice_update.go and ent/assetprice_update_one.go: The existing 'SetPrice' and 'sqlSave' methods have been updated to support better data handling.
• Client struct improvement: The Client struct in 'ent/client.go' now includes a new field 'tables' for better data structuring.
• Enhancements in EventLog: A new method, 'NamedSigners', has been added to the 'EventLog' struct in 'eventlog.go', extending its functionality.
• Added and removed files: New files have been added (ent/gql_collection.go and ent/gql_edge.go), and a file has been removed (ent/generate.go).
• New files and changes to existing files: This PR introduces several new files - 'ent/entc.go', 'src/ent/gql_node.go', 'src/ent/gql_transaction.go', and 'src/ent/helpers/bigint.go' - each containing significant code or functionality additions. Some modifications have been made in existing files, such as 'src/ent/migrate/schema.go' and 'src/ent/runtime.go'.
• GraphQL schema definitions: The file 'src/gql/unchained.graphql' has new schemas added.
• Resolvers and gqlgen configuration: New file 'src/gql/unchained.resolvers.go' has resolver implementations for fields in the GraphQL schema. The 'src/gqlgen.yml' is a new addition for configuration of the 'gqlgen' tool.
• Bug fixes: Fixed potential nil pointer dereference error in 'src/net/client/client.go', and deprecated method call in 'src/plugins/uniswap/uniswap.go'.
• Added new dependencies in go.mod: Several new dependencies have been added to support GraphQL operations and multierror handling.
• New 'Bytes' type: A new 'Bytes' type has been introduced in 'types/bytes.go' for better data handling.
• Additions in server handlers: Server handlers have been enhanced in the 'server.go' file.