export home chain types (#1095)

## Motivation

We need these types in the ccip module.

## Solution

Export the required types.

core/services/ocr3/plugins/ccip/pkg/reader/home_chain.go

@@ -0,0 +1,24 @@
+package reader
+
+import (
+	"time"
+
+	"github.com/smartcontractkit/chainlink-common/pkg/logger"
+	"github.com/smartcontractkit/chainlink-common/pkg/types"
+
+	reader_internal "github.com/smartcontractkit/ccipocr3/internal/reader"
+)
+
+type HomeChain = reader_internal.HomeChain
+
+type ChainConfig = reader_internal.ChainConfig
+
+type ChainConfigInfo = reader_internal.ChainConfigInfo
+
+func NewHomeChainReader(
+	homeChainReader types.ContractReader,
+	lggr logger.Logger,
+	pollingInterval time.Duration,
+) HomeChain {
+	return reader_internal.NewHomeChainConfigPoller(homeChainReader, lggr, pollingInterval)
+}