GraphQL master FF for review (#18445)

* Initial work on a graphql API

* Added receipts, and more transaction fields.

* Finish receipts, add logs

* Add transactionCount to block

* Add types  and .

* Update Block type to be compatible with ethql

* Rename nonce to transactionCount in Account, to be compatible with ethql

* Update transaction, receipt and log to match ethql

* Add  query operator, for a range of blocks

* Added ommerCount to Block

* Add transactionAt and ommerAt to Block

* Added sendRawTransaction mutation

* Add Call and EstimateGas to graphQL API

* Refactored to use hexutil.Bytes instead of HexBytes

* Replace BigNum with hexutil.Big

* Refactor call and estimateGas to use ethapi struct type

* Replace ethgraphql.Address with common.Address

* Replace ethgraphql.Hash with common.Hash

* Converted most quantities to Long instead of Int

* Add support for logs

* Fix bug in runFilter

* Restructured Transaction to work primarily with headers, so uncle data is reported properly

* Add gasPrice API

* Add protocolVersion API

* Add syncing API

* Moved schema into its own source file

* Move some single use args types into anonymous structs

* Add doc-comments

* Fixed backend fetching to use context

* Added (very) basic tests

* Add documentation to the graphql schema

* Fix reversion for formatting of big numbers

* Correct spelling error

* s/BigInt/Long/

* Update common/types.go

* Fixes in response to review

* Fix lint error

* Updated calls on private functions

* Fix typo in graphql.go

* Rollback ethapi breaking changes for graphql support
Co-Authored-By: Arachnid <arachnid@notdot.net>

vendor/github.com/graph-gophers/graphql-go/errors/errors.go

@@ -0,0 +1,41 @@
+package errors
+
+import (
+	"fmt"
+)
+
+type QueryError struct {
+	Message       string        `json:"message"`
+	Locations     []Location    `json:"locations,omitempty"`
+	Path          []interface{} `json:"path,omitempty"`
+	Rule          string        `json:"-"`
+	ResolverError error         `json:"-"`
+}
+
+type Location struct {
+	Line   int `json:"line"`
+	Column int `json:"column"`
+}
+
+func (a Location) Before(b Location) bool {
+	return a.Line < b.Line || (a.Line == b.Line && a.Column < b.Column)
+}
+
+func Errorf(format string, a ...interface{}) *QueryError {
+	return &QueryError{
+		Message: fmt.Sprintf(format, a...),
+	}
+}
+
+func (err *QueryError) Error() string {
+	if err == nil {
+		return "<nil>"
+	}
+	str := fmt.Sprintf("graphql: %s", err.Message)
+	for _, loc := range err.Locations {
+		str += fmt.Sprintf(" (line %d, column %d)", loc.Line, loc.Column)
+	}
+	return str
+}
+
+var _ error = &QueryError{}