make terminal emulator configurable

src/ui/settings/FileSetting.svelte

@@ -0,0 +1,28 @@
+<script>
+    import { createEventDispatcher } from 'svelte';
+    import { open } from '@tauri-apps/api/dialog';
+    import Setting from './Setting.svelte';
+
+    export let title;
+    export let divider = true;
+    export let value;
+
+    const dispatch = createEventDispatcher();
+</script>
+
+
+<Setting {title} {divider}>
+    <div slot="input">
+        <input
+            type="text"
+            class="input input-sm input-bordered grow text-right"
+            bind:value
+            on:change={() => dispatch('update', {value})}
+        >
+        <button 
+            class="btn btn-sm btn-primary"
+            on:click={async () => value = await open()}
+        >Browse</button>
+    </div>
+    <slot name="description" slot="description"></slot>
+</Setting>