move front end files into repo

AobaClient/assets/style/mixins.scss

@@ -0,0 +1,43 @@
+$navBarSize: 40px;
+
+@mixin mobile {
+	@media (max-width: 700px) {
+		@content;
+	}
+}
+
+@mixin max-screen($size) {
+	@media (max-width: #{$size}) {
+		@content;
+	}
+}
+
+@mixin max-container($size) {
+	@container (max-width: #{$size}) {
+		@content;
+	}
+}
+
+@mixin small-container {
+	@container (max-width: 500px) {
+		@content;
+	}
+}
+
+@mixin medium-container {
+	@container (max-width: 800px) {
+		@content;
+	}
+}
+
+@mixin large-container {
+	@container (max-width: 1000px) {
+		@content;
+	}
+}
+
+@mixin xlarge-container {
+	@container (max-width: 1200px) {
+		@content;
+	}
+}