Backport to branch(3.11) : Add ScalarDB Dao and related files (#2512)

Co-authored-by: inv-jishnu <[email protected]>
Co-authored-by: Jishnu J <[email protected]>

Author: feeblefakie

data-loader/core/src/main/java/com/scalar/db/dataloader/core/ErrorMessage.java

@@ -17,6 +17,10 @@ public class ErrorMessage {
   public static final String CLUSTERING_KEY_NOT_FOUND =
       "The provided clustering key %s was not found";
   public static final String INVALID_PROJECTION = "The column '%s' was not found";
+  public static final String ERROR_CRUD_EXCEPTION =
+      "Something went wrong while trying to save the data. Details: %s";
+  public static final String ERROR_SCAN =
+      "Something went wrong while scanning. Are you sure you are running in the correct transaction mode? Details: %s";
   public static final String MISSING_NAMESPACE_OR_TABLE = "Missing namespace or table: %s, %s";
   public static final String TABLE_METADATA_RETRIEVAL_FAILED =
       "Failed to retrieve table metadata. Details: %s";