Implement Sway

Try switching from gdm to sddm as gdm pulls in a lot of GNOME packages

Fix comment
Update sway.py

profiles/applications/sway.py

@@ -0,0 +1,3 @@
+import archinstall
+
+installation.add_additional_packages("sway sddm")

profiles/sway.py

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+# A desktop environment using "Sway"
+
+import archinstall
+
+is_top_level_profile = False
+
+def _prep_function(*args, **kwargs):
+	"""
+	Magic function called by the importing installer
+	before continuing any further. It also avoids executing any
+	other code in this stage. So it's a safe way to ask the user
+	for more input before any other installer steps start.
+	"""
+	return True
+
+# Ensures that this code only gets executed if executed
+# through importlib.util.spec_from_file_location("sway", "/somewhere/sway.py")
+# or through conventional import sway
+if __name__ == 'sway':
+	# Install the application sway from the template under /applications/
+	sway = archinstall.Application(installation, 'sway')
+	sway.install()
+
+	installation.enable_service('sddm') # SDDM, which supports Sway