Lib: Move form stuff into form/ directory

src/lib/components/form/Search.svelte

@@ -0,0 +1,83 @@
+<script lang="ts">
+  import {
+    Autocomplete,
+    popup,
+    type AutocompleteOption,
+    type PopupSettings,
+  } from "@skeletonlabs/skeleton";
+  import type { Snippet } from "svelte";
+  import { v4 as uuid } from "uuid";
+
+  interface SearchProps {
+    children: Snippet;
+
+    /** Placeholder for the empty input element */
+    placeholder?: string;
+
+    /** Form name of the input element, to reference input data after form submission */
+    name?: string;
+
+    /** Manually set the label width, to align multiple inputs vertically. Supply value in CSS units. */
+    labelwidth?: string;
+
+    /** The variable to bind to the input element. Has to be a [$state] so its value can be updated with the input element's contents. */
+    input_variable: string;
+
+    /** The ID of the input element. UUID by default. */
+    input_id?: string;
+
+    /** The ID of the popup to trigger. UUID by default. */
+    popup_id?: string;
+
+    /** The [PopupSettings] object for the popup to trigger. */
+    popup_settings?: PopupSettings;
+
+    /** The event handler updating the [input_variable] after selection. */
+    selection_handler?: (event: CustomEvent<AutocompleteOption<string>>) => void;
+
+    /** The options this autocomplete component allows to choose from.
+     * Example: [[{ label: "Aston", value: "0" }, { label: "VCARB", value: "1" }]].
+     */
+    options: AutocompleteOption<string, unknown>[];
+  }
+
+  let {
+    children,
+    placeholder = "",
+    name = "",
+    labelwidth = "auto",
+    input_variable,
+    input_id = uuid(),
+    popup_id = uuid(),
+    popup_settings = {
+      event: "focus-click",
+      target: popup_id,
+      placement: "bottom",
+    },
+    selection_handler = (event: CustomEvent<AutocompleteOption<string>>): void => {
+      input_variable = event.detail.label;
+    },
+    options,
+  }: SearchProps = $props();
+</script>
+
+<div class="input-group input-group-divider grid-cols-[auto_1fr_auto]">
+  <div
+    class="input-group-shim select-none text-nowrap text-neutral-900"
+    style="width: {labelwidth};"
+  >
+    {@render children()}
+  </div>
+  <input
+    id={input_id}
+    type="search"
+    {placeholder}
+    {name}
+    bind:value={input_variable}
+    use:popup={popup_settings}
+  />
+</div>
+
+<div data-popup={popup_id} class="card z-10 w-auto p-2 shadow" tabindex="-1">
+  <Autocomplete bind:input={input_variable} {options} on:selection={selection_handler} />
+</div>