feat: create default logical block size

internal/storage/block_size.go

@@ -0,0 +1,12 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
+package storage
+
+const KB uint64 = 1024
+
+// LogicalBlockSize represents a single logical address, which is equivalent to 4,096 bytes (4 KiB)
+//
+// A logical block is the minimum block that any file can allocate. Large files consist of multiple blocks.
+// More information can be found here: https://en.wikipedia.org/wiki/Logical_block_addressing
+const LogicalBlockSize = 4 * KB