Refactoring: move all code files into a src directory

src/UI/Base/Tr.svelte

@@ -0,0 +1,38 @@
+<script lang="ts">
+  /**
+   * Properly renders a translation
+   */
+  import { Translation } from "../i18n/Translation"
+  import { onDestroy } from "svelte"
+  import Locale from "../i18n/Locale"
+  import { Utils } from "../../Utils"
+  import FromHtml from "./FromHtml.svelte"
+  import WeblateLink from "./WeblateLink.svelte"
+
+  export let t: Translation
+  export let cls: string = ""
+  export let tags: Record<string, string> | undefined = undefined
+  // Text for the current language
+  let txt: string | undefined
+
+  $: onDestroy(
+    Locale.language.addCallbackAndRunD((l) => {
+      const translation = t?.textFor(l)
+      if (translation === undefined) {
+        return
+      }
+      if (tags) {
+        txt = Utils.SubstituteKeys(txt, tags)
+      } else {
+        txt = translation
+      }
+    })
+  )
+</script>
+
+{#if t}
+  <span class={cls}>
+    <FromHtml src={txt} />
+    <WeblateLink context={t.context} />
+  </span>
+{/if}