Adding dynamic generation of the gear list

The gear list is generated based on `/gear/gear.json`, which contains
a list of objects following the schema defined in `/gear/gear.mjs`.

global/loadin.js

@@ -1,8 +0,0 @@
-function loadHTML(elementId, url) {
-    fetch(url)
-        .then((response) => response.text())
-        .then((data) => {
-            document.getElementById(elementId).innerHTML = data;
-        })
-        .catch((error) => console.error("Error loading HTML:", error));
-}