Add contributing file, rename some files

src/app/util/analytics.ts

@@ -0,0 +1,20 @@
+/* eslint prefer-rest-params: 0 */
+
+import {page} from "$app/stores"
+import {getSetting} from "@app/core/state"
+
+const w = window as any
+
+w.plausible =
+  w.plausible ||
+  function () {
+    ;(w.plausible.q = w.plausible.q || []).push(arguments)
+  }
+
+export const setupAnalytics = () => {
+  page.subscribe($page => {
+    if ($page.route && getSetting("report_usage")) {
+      w.plausible("pageview", {u: $page.route.id})
+    }
+  })
+}