Windows Performance Improvement & Multi-Item support (#43)

* Initial IFileOperation for Windows

- Try using IFileOperation instead of SHFileOperation
  - Use pywin32 to accomplish this
  - Implement fallback when pywin32 not available
- Handles paths like `C:\` just fine bu the `\\?\` paths in the test
  cause issue
- Add batching for IFileOperation version (performance)
- Minor formatting applied by editor

* Fix issue with paths starting with \\?\

- Strip these characters off if present just like old implementation

* Add windows version check, legacy list support

- Add check for windows version for IFileOperation
- Add list support to legacy version
- Remove some debugging code
- Fix bug in path converson

Not sure if there is a better way to layout this file

* Split plat_win into legacy and modern

* Update other platforms for list support

Formatter also ran on these so some other minor changes.

* Add unit tests for multi-file calls

send2trash/plat_gio.py

@@ -7,13 +7,17 @@
 from gi.repository import GObject, Gio
 from .exceptions import TrashPermissionError
 
-def send2trash(path):
-    try:
-        f = Gio.File.new_for_path(path)
-        f.trash(cancellable=None)
-    except GObject.GError as e:
-        if e.code == Gio.IOErrorEnum.NOT_SUPPORTED:
-            # We get here if we can't create a trash directory on the same
-            # device. I don't know if other errors can result in NOT_SUPPORTED.
-            raise TrashPermissionError('')
-        raise OSError(e.message)
+
+def send2trash(paths):
+    if not isinstance(paths, list):
+        paths = [paths]
+    for path in paths:
+        try:
+            f = Gio.File.new_for_path(path)
+            f.trash(cancellable=None)
+        except GObject.GError as e:
+            if e.code == Gio.IOErrorEnum.NOT_SUPPORTED:
+                # We get here if we can't create a trash directory on the same
+                # device. I don't know if other errors can result in NOT_SUPPORTED.
+                raise TrashPermissionError("")
+            raise OSError(e.message)