feat: Add and rename screens

- Add windows screen
- Add windows.js
- Different variants of classes for drag and edge snap behaviour
- Rename js files to better distinguish usage

source/style/modules/ui/_windows_module.scss

@@ -0,0 +1,36 @@
+@use "sass:map";
+
+@use "../../hippie-style/hippie";
+
+#task-bar {
+	@extend %flex-inline;
+	z-index: map.get(hippie.$z-indexes, "content-top");
+	align-items: stretch;
+	position: fixed;
+	//right: 0;
+	//bottom: 0;
+	//left: 0;
+	border: 1px solid transparent;
+	padding: hippie.$space_basic;
+	background-color: rgba(0, 0, 0, .1);
+
+	button {
+		@extend .button_io;
+		overflow: hidden;
+	}
+}
+
+#screen-space {
+	position: relative;
+	height: 100%;
+}
+
+#placeholder {
+	display: none;
+	z-index: map.get(hippie.$z-indexes, "content-top");
+	position: fixed;
+	width: 100px;
+	height: 100px;
+	border: 2px dashed deeppink;
+	background-color: hotpink;
+}