Merge master: the modules moved into a package

Every file this branch touches moved into dikte/, so the merge is mostly the
rename following the edits. What needed a hand:

hotkey.py: master replaced the _macos()/_gnome() pair with one backend()
chooser, and this branch had added _windows() to the pair. Windows is a fifth
value of the chooser now, and everything that used to ask "macOS or Windows?"
asks backend() instead. The key is held by the running process there, so
installs_shortcuts() and shortcut_needs_restart() are both false for it, and
desktop_name() says Windows.

install.ps1 and the Windows README name dikte/__main__.py, the entry point the
Linux and macOS installers were pointed at in the same commit. The Start Menu
entry, the autostart entry and the dikte.cmd shim all come off one $entry
variable.

settings_ui.py: the shortcut tab now has a Windows sentence of its own, with
the Turkish for it. Falling through to the branch master wrote for a desktop
with no registry would have told a Windows user to check /dev/input. Nothing
covers that branch: there is no Windows Settings test class, the way there is
one for macOS.

CONTRIBUTING: the chooser it names is backend() now, and the test count is the
merged one, 1067 of 1110 running anywhere.

tests/test_cli.py

@@ -12,13 +12,13 @@ import json
 import unittest
 from unittest import mock
 
-import audio
-import cli
-import config as cfg
-import ggml
-import hotkey
-import ipc
-import paste
+from dikte import audio
+from dikte import cli
+from dikte import config as cfg
+from dikte import ggml
+from dikte import hotkey
+from dikte import ipc
+from dikte import paste
 from tests.support import DikteTest, fake_urlopen, only_these_tools
 
 
@@ -165,7 +165,7 @@ class Parser(unittest.TestCase):
                                  name)
 
     def test_every_verb_is_wired_to_something(self):
-        for verb in ("record", "toggle", "start", "stop", "cancel", "ask",
+        for verb in ("record", "toggle", "start", "stop", "pause", "cancel", "ask",
                      "session", "transcribe", "meeting", "meetings", "history",
                      "config", "prompt", "devices", "models", "test-key",
                      "doctor", "shortcut", "status", "settings", "restart",
@@ -660,6 +660,14 @@ class Replies(DikteTest):
                 captured():
             self.assertEqual(cli.run(["cancel"]), 0)
 
+    def test_pausing_a_recording_nobody_started_is_not_a_failure_either(self):
+        """A key that pauses can be pressed when there is nothing to pause, and
+        it must not start an application to tell you so."""
+        with mock.patch.object(ipc, "send", return_value=None), \
+                mock.patch.object(cli, "launch_gui") as launched, captured():
+            self.assertEqual(cli.run(["pause"]), 0)
+        self.assertFalse(launched.called)
+
 
 class TranscribeRunsHere(DikteTest):
     """`dikte transcribe` runs in this process, not in the instance."""