More properties, cleanup

src/commonMain/kotlin/nl/astraeus/css/properties/Box.kt

@@ -0,0 +1,39 @@
+package nl.astraeus.css.properties
+
+class BoxDecorationBreak(
+    value: String
+): CssProperty(value) {
+
+    companion object {
+        fun slice() = BorderWidth("slice")
+        fun clone() = BorderWidth("clone")
+        fun initial() = BorderWidth("initial")
+        fun inherit() = BorderWidth("inherit")
+        fun unset() = BorderWidth("unset")
+    }
+}
+
+class BoxShadow(
+    value: String
+): CssProperty(value) {
+
+    companion object {
+        fun none() = BoxShadow("none")
+        fun text(txt: String) = BoxShadow(txt)
+        fun inset() = BoxShadow("inset")
+        fun initial() = BoxShadow("initial")
+        fun inherit() = BoxShadow("inherit")
+    }
+}
+
+class BoxSizing(
+    value: String
+): CssProperty(value) {
+
+    companion object {
+        fun contextBox() = BoxSizing("content-box")
+        fun borderBox() = BoxSizing("border-box")
+        fun initial() = BoxShadow("initial")
+        fun inherit() = BoxShadow("inherit")
+    }
+}