runners : Create runners file and basic runnners

This adds runners.py, it contains a set of functions that peform all the
various task that unisync can do (sync, add and mount for now).
They are simple function that put together all the rest.

src/unisync/runners.py

@@ -0,0 +1,32 @@
+from synchroniser import Synchroniser
+from paths import PathsManager
+
+
+def unisync_sync(synchroniser:Synchroniser, paths_manager:PathsManager):
+    if synchroniser.create_ssh_master_connection() != 0:
+        print("Connection failed quitting")
+        return 1
+    print("Connected to the remote.")
+
+    synchroniser.sync_files(paths_manager.get_paths_to_sync())
+    synchroniser.update_links(background=False)
+   
+    # TODO check the config options
+    #synchroniser.mount_remote_dir()
+
+    synchroniser.close_ssh_master_connection()
+
+
+def unisync_add(synchroniser:Synchroniser, paths_manager:PathsManager):
+    if synchroniser.create_ssh_master_connection() != 0:
+        print("Connection failed quitting")
+        return 1
+    print("Connected to the remote.")
+
+    paths_manager.add_files_to_sync()
+
+    synchroniser.close_ssh_master_connection()
+
+
+def unisync_mount(synchroniser:Synchroniser, paths_manager:PathsManager):
+    synchroniser.mount_remote_dir()