Update to reccommended file structure

Use reccommended database structure
Switch to SQLite and update scheme along with it

gallery/user/themes/default/ui/reset.scss

@@ -0,0 +1,16 @@
+* {
+    box-sizing: border-box;
+    line-height: 1;
+}
+
+html,
+body {
+    margin: 0;
+    padding: 0;
+    
+    min-height: 100vh;
+    
+    background-color: $black100;
+    
+    scroll-behavior: smooth;
+}