Prototype multi threaded file reader (#343)

- Reading files from nfs shares tops out at ~1GB/s for single threaded
reads.
- MultiThreadedFileReader uses our File wrapper to read a generic file
in parallel
- Placed in aare::experimental to show that it's not production ready

python/aare/__init__.py

@@ -3,8 +3,14 @@
 from . import _aare
 
 from . import transform
+from . import experimental
 
-from ._aare import File, RawMasterFile, RawSubFile, JungfrauDataFile
+from ._aare import (
+    File,
+    JungfrauDataFile,
+    RawMasterFile,
+    RawSubFile,
+)
 from ._aare import Pedestal_d, Pedestal_f, ClusterFinder_Cluster3x3i, VarClusterFinder
 from ._aare import DetectorType, ReadoutMode 
 from ._aare import hitmap

python/aare/experimental.py

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: MPL-2.0
+"""Experimental APIs that may change without notice."""
+
+from ._aare.experimental import MultiThreadedFileReader
+
+__all__ = ["MultiThreadedFileReader"]