all: separate catalyst package (#24280)

* all: seperate catalyst package

* eth/catalyst: moved some methods, added docs

* eth/catalyst, les/catalyst: add method docs

* core, eth, les, miner: move common function to beacon package

* eth/catalyst: goimported

* cmd/utils, miner/stress/beacon: naming nitpicks

Co-authored-by: Marius van der Wijden <m.vanderwijden@live.de>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>

core/beacon/gen_blockparams.go

@@ -0,0 +1,53 @@
+// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
+
+package beacon
+
+import (
+	"encoding/json"
+	"errors"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+var _ = (*payloadAttributesMarshaling)(nil)
+
+// MarshalJSON marshals as JSON.
+func (p PayloadAttributesV1) MarshalJSON() ([]byte, error) {
+	type PayloadAttributesV1 struct {
+		Timestamp             hexutil.Uint64 `json:"timestamp"     gencodec:"required"`
+		Random                common.Hash    `json:"random"        gencodec:"required"`
+		SuggestedFeeRecipient common.Address `json:"suggestedFeeRecipient"  gencodec:"required"`
+	}
+	var enc PayloadAttributesV1
+	enc.Timestamp = hexutil.Uint64(p.Timestamp)
+	enc.Random = p.Random
+	enc.SuggestedFeeRecipient = p.SuggestedFeeRecipient
+	return json.Marshal(&enc)
+}
+
+// UnmarshalJSON unmarshals from JSON.
+func (p *PayloadAttributesV1) UnmarshalJSON(input []byte) error {
+	type PayloadAttributesV1 struct {
+		Timestamp             *hexutil.Uint64 `json:"timestamp"     gencodec:"required"`
+		Random                *common.Hash    `json:"random"        gencodec:"required"`
+		SuggestedFeeRecipient *common.Address `json:"suggestedFeeRecipient"  gencodec:"required"`
+	}
+	var dec PayloadAttributesV1
+	if err := json.Unmarshal(input, &dec); err != nil {
+		return err
+	}
+	if dec.Timestamp == nil {
+		return errors.New("missing required field 'timestamp' for PayloadAttributesV1")
+	}
+	p.Timestamp = uint64(*dec.Timestamp)
+	if dec.Random == nil {
+		return errors.New("missing required field 'random' for PayloadAttributesV1")
+	}
+	p.Random = *dec.Random
+	if dec.SuggestedFeeRecipient == nil {
+		return errors.New("missing required field 'suggestedFeeRecipient' for PayloadAttributesV1")
+	}
+	p.SuggestedFeeRecipient = *dec.SuggestedFeeRecipient
+	return nil
+}