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/TreeViewAdapter/UseCollectionSelectionStateUpdater.ts

@@ -0,0 +1,38 @@
+import { inject } from 'vue';
+import { InjectionKeys } from '@/presentation/injectionSymbols';
+import { TreeNodeCheckState } from '../TreeView/Node/State/CheckState';
+import { TreeNodeStateChangedEmittedEvent } from '../TreeView/Bindings/TreeNodeStateChangedEmittedEvent';
+
+export function useCollectionSelectionStateUpdater() {
+  const { modifyCurrentState, currentState } = inject(InjectionKeys.useCollectionState)();
+
+  const updateNodeSelection = (event: TreeNodeStateChangedEmittedEvent) => {
+    const { node } = event;
+    if (node.hierarchy.isBranchNode) {
+      return; // A category, let TreeView handle this
+    }
+    if (event.change.oldState.checkState === event.change.newState.checkState) {
+      return;
+    }
+    if (node.state.current.checkState === TreeNodeCheckState.Checked) {
+      if (currentState.value.selection.isSelected(node.id)) {
+        return;
+      }
+      modifyCurrentState((state) => {
+        state.selection.addSelectedScript(node.id, false);
+      });
+    }
+    if (node.state.current.checkState === TreeNodeCheckState.Unchecked) {
+      if (!currentState.value.selection.isSelected(node.id)) {
+        return;
+      }
+      modifyCurrentState((state) => {
+        state.selection.removeSelectedScript(node.id);
+      });
+    }
+  };
+
+  return {
+    updateNodeSelection,
+  };
+}