feat(geocaching): add initial page for 2023

feat(sliding_gallery): add horizontal scrolling gallery component

assets/sass/sliding_gallery.scss

@@ -0,0 +1,29 @@
+.sliding_gallery {
+    display: flex;
+    flex-direction: row;
+    overflow-x: auto;
+
+    scrollbar-width: auto !important;
+    scrollbar-color: $accent rgba(0, 0, 0, 0.1) !important;
+    margin: 2rem 0;
+
+    figure {
+        min-width: 30rem;
+
+    }
+
+    &::-webkit-scrollbar {
+      width: 12px;               /* width of the entire scrollbar */
+    }
+
+    &::-webkit-scrollbar-track {
+      background: orange;        /* color of the tracking area */
+    }
+
+    &::-webkit-scrollbar-thumb {
+      background-color: blue;    /* color of the scroll thumb */
+      border-radius: 20px;       /* roundness of the scroll thumb */
+      border: 3px solid orange;  /* creates padding around scroll thumb */
+    }
+
+}