More properties, cleanup

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

@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class Direction(
+    value: String
+) : CssProperty(value) {
+
+    companion object {
+        fun ltr() = Direction("ltr")
+        fun rtl() = Direction("rtl")
+        fun initial() = Direction("initial")
+        fun inherit() = Direction("inherit")
+    }
+
+}