Introduce new TreeView UI component

Key highlights:

- Written from scratch to cater specifically to privacy.sexy's
  needs and requirements.
- The visual look mimics the previous component with minimal changes,
  but its internal code is completely rewritten.
- Lays groundwork for future functionalities like the "expand all"
  button a flat view mode as discussed in #158.
- Facilitates the transition to Vue 3 by omitting the Vue 2.0 dependent
  `liquour-tree` as part of #230.

Improvements and features:

- Caching for quicker node queries.
- Gradual rendering of nodes that introduces a noticable boost in
  performance, particularly during search/filtering.
  - `TreeView` solely governs the check states of branch nodes.

Changes:

- Keyboard interactions now alter the background color to highlight the
  focused item. Previously, it was changing the color of the text.
- Better state management with clear separation of concerns:
  - `TreeView` exclusively manages indeterminate states.
  - `TreeView` solely governs the check states of branch nodes.
  - Introduce transaction pattern to update state in batches to minimize
    amount of events handled.
- Improve keyboard focus, style background instead of foreground. Use
  hover/touch color on keyboard focus.
- `SelectableTree` has been removed. Instead, `TreeView` is now directly
  integrated with `ScriptsTree`.
- `ScriptsTree` has been refactored to incorporate hooks for clearer
  code and separation of duties.
- Adopt Vue-idiomatic bindings instead of keeping a reference of the
  tree component.
- Simplify and change filter event management.
- Abandon global styles in favor of class-scoped styles.
- Use global mixins with descriptive names to clarify indended
  functionality.

src/presentation/components/Scripts/View/Tree/ScriptsTree.vue

@@ -0,0 +1,58 @@
+<template>
+  <span id="container">
+    <span v-if="initialNodes.length">
+      <TreeView
+        :initialNodes="initialNodes"
+        :selectedLeafNodeIds="selectedScriptNodeIds"
+        :latestFilterEvent="latestFilterEvent"
+        @nodeStateChanged="handleNodeChangedEvent($event)"
+      >
+        <template v-slot:node-content="{ nodeMetadata }">
+          <NodeContent :nodeMetadata="nodeMetadata" />
+        </template>
+      </TreeView>
+    </span>
+    <span v-else>Nooo 😢</span>
+  </span>
+</template>
+
+<script lang="ts">
+import { defineComponent } from 'vue';
+import TreeView from './TreeView/TreeView.vue';
+import NodeContent from './NodeContent/NodeContent.vue';
+import { useTreeViewFilterEvent } from './TreeViewAdapter/UseTreeViewFilterEvent';
+import { useTreeViewNodeInput } from './TreeViewAdapter/UseTreeViewNodeInput';
+import { useCollectionSelectionStateUpdater } from './TreeViewAdapter/UseCollectionSelectionStateUpdater';
+import { TreeNodeStateChangedEmittedEvent } from './TreeView/Bindings/TreeNodeStateChangedEmittedEvent';
+import { useSelectedScriptNodeIds } from './TreeViewAdapter/UseSelectedScriptNodeIds';
+
+export default defineComponent({
+  props: {
+    categoryId: {
+      type: [Number, undefined],
+      default: undefined,
+    },
+  },
+  components: {
+    TreeView,
+    NodeContent,
+  },
+  setup(props) {
+    const { selectedScriptNodeIds } = useSelectedScriptNodeIds();
+    const { latestFilterEvent } = useTreeViewFilterEvent();
+    const { treeViewInputNodes } = useTreeViewNodeInput(() => props.categoryId);
+    const { updateNodeSelection } = useCollectionSelectionStateUpdater();
+
+    function handleNodeChangedEvent(event: TreeNodeStateChangedEmittedEvent) {
+      updateNodeSelection(event);
+    }
+
+    return {
+      initialNodes: treeViewInputNodes,
+      selectedScriptNodeIds,
+      latestFilterEvent,
+      handleNodeChangedEvent,
+    };
+  },
+});
+</script>