feat(migrate): [1/7] Core planner, validator, sync executor, and basic CLI

redisvl/migration/__init__.py

@@ -0,0 +1,21 @@
+from redisvl.migration.models import (
+    DiskSpaceEstimate,
+    FieldRename,
+    MigrationPlan,
+    MigrationReport,
+    RenameOperations,
+    SchemaPatch,
+)
+from redisvl.migration.planner import MigrationPlanner
+from redisvl.migration.validation import MigrationValidator
+
+__all__ = [
+    "DiskSpaceEstimate",
+    "FieldRename",
+    "MigrationPlan",
+    "MigrationPlanner",
+    "MigrationReport",
+    "MigrationValidator",
+    "RenameOperations",
+    "SchemaPatch",
+]