feat(ShellPkg/VisualFileMan): implement full-featured dual-pane Visual File Manager

Developed a visual, native text-based file manager application for the UEFI Shell to facilitate intuitive file and directory management.

Key implementations and features include:
1. UI & Navigation:
   - Dual-pane layout with color-coded syntax (Directories: Cyan, Executables: Green).
   - High-performance, flicker-free rendering by optimizing screen redraw logic instead of full `ClearScreen` clearing.
   - Smooth keyboard navigations (`Tab` to switch panes, `Up/Down` to scroll).

2. File System Traversal:
   - Handled deep directory logic with universal `..` injection.
   - Designed a virtual `Drives:` parent level bridging across all block devices, dynamically mapping handles via `GetMapFromDevicePath` to allow smooth fs0:, fs1: transversals.
   - Safe DirName trailing slash normalization avoiding `EFI_UNSUPPORTED` exception under strict filesystem drivers.

3. Core File Operations (F-Keys):
   - Implemented `InputBox` with active cursor and inline editing (Left/Right/Backspace/Delete), alongside `ConfirmBox` and `MessageBox`.
   - F5 Copy & F6 Move: Smart destination detection (automatically appending filenames when targets are pure directories).
   - F7 MkDir & F8 Delete: Complete operations bound safely to EDKII ShellLib protocols.

Author: Ssunk

README.md

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+# UEFI VisualFileMan
+![UEFI VisualFileMan Preview](https://img.shields.io/badge/UEFI-VisualFileMan-blue?style=flat-square)
+
+[中文版](#中文说明) | [English Version](#english-readme)
+
+---
+
+## 中文说明
+
+**VisualFileMan** 是一个专为 EDK II (UEFI Shell) 开发的轻量级、双面板、可视化文本控制台文件管理器。它受 Midnight Commander (`mc`) 启发，让你告别枯燥的纯命令行敲打，在 UEFI 层级中高效地复制、移动、并浏览各种文件和磁盘分卷。
+
+### 🌟 核心特性
+- **双面布局可视操作**：经典双面板并行显示文件树视图，通过 `Tab` 键在两个面板间自由穿梭切换。
+- **色彩语法**：彩色文件展示——青色（Cyan）代表目录，绿色（Green）代表原生 UEFI 固件可执行文件 (`.efi`)，一目了然。
+- **丝滑不闪烁的 TUI**：摒弃了每次按键即暴力 `ClearScreen()` 的闪屏问题，改为原址字符覆写策略，按键操作更流畅。
+- **完整的块设备穿越支持 (跨盘符导航)**：自动生成一个顶层抽象 `Drives:` 虚拟入口，退到根目录后再后退时，自动列出所有的 Block Devices (形如 `fs0:`, `fs1:` 等)，轻松跨越磁盘边界。
+- **快捷键直达执行**：集成基础对话框 (`MessageBox`、带光标编辑功能的 `InputBox` 等) 以提供安全的 F-Key 按键热操：
+  - `F5` - **复制** 文件（基于智能目录感知的拼接）
+  - `F6` - **移动 / 重命名**
+  - `F7` - **新建文件夹 (MkDir)**
+  - `F8` - **删除 (Delete)** 文件或控文件夹
+
+### 🛠️ 编译与安装
+
+1. **环境准备**：将此项目全部文件放入 EDK2 工作目录：`ShellPkg/Application/VisualFileMan/` 中。
+2. **连接编译链**：确保在 EDK II 的 `ShellPkg/ShellPkg.dsc` 的 `[Components]` 部分包含该工程：
+   ```ini
+   [Components]
+     ShellPkg/Application/VisualFileMan/VisualFileMan.inf
+   ```
+3. **编译执行**：
+   使用 EDK II 全局 build 脚本生成 `.efi` ：
+   ```bash
+   source edksetup.sh
+   build -p ShellPkg/ShellPkg.dsc -a X64 -t GCC -b DEBUG
+   ```
+4. **拷入磁盘测试**：将编译输出在 `Build/Shell/DEBUG_GCC/X64/VisualFileMan.efi` 的应用复制至你的 U 盘或 OVMF 的虚拟硬盘挂载点并启动运行即可。
+
+---
+
+## English README
+
+**VisualFileMan** is a lightweight, dual-pane, text-based visual file manager designed exclusively for EDK II (UEFI Shell). Inspired by Midnight Commander (`mc`), it provides an intuitive and efficient way to explore, copy, and move files across volumes without relying on raw UEFI command-line interactions.
+
+### 🌟 Key Features
+- **Dual-Pane Layout**: Classic side-by-side directory panels. Seamlessly navigate and switch between the active pane by pressing `Tab`.
+- **Color-Coded Feedback**: Syntactically colored UI — Cyan for directories and Green for native UEFI executable files (`.efi`).
+- **Flicker-Free Rendering**: Instead of using forceful `ClearScreen()` functions which blank the screen on every key press, this app relies on in-place padding/character overwriting algorithms ensuring perfectly silky rendering.
+- **Cross-Disk Subsystem Transversal**: Intelligently handles root directory idiosyncrasies. Escaping the root partition exposes a virtual `Drives:` root displaying all auto-mapped handles like `fs0:`, `fs1:`, allowing cross-volume exploration.
+- **Native F-Key Bindings via Built-In InputWidgets**: Comes with built-in `InputBox` featuring hardware cursor/text editing and `MessageBox` to handle raw UEFI inputs:
+  - `F5` - **Copy** (Intelligent directory destination detection)
+  - `F6` - **Move / Rename**
+  - `F7` - **Create Directory (MkDir)**
+  - `F8` - **Delete**
+
+### 🛠️ Build and Installation
+
+1. **Copy the Source**: Move this repository's folder into your EDK2 workspace: `ShellPkg/Application/VisualFileMan/`.
+2. **Hook the Component**: In EDK II, open `ShellPkg/ShellPkg.dsc` and add the application under `[Components]`:
+   ```ini
+   [Components]
+     ShellPkg/Application/VisualFileMan/VisualFileMan.inf
+   ```
+3. **Compile the App**:
+   Run the standard EDK II build script targeting ShellPkg:
+   ```bash
+   source edksetup.sh
+   build -p ShellPkg/ShellPkg.dsc -a X64 -t GCC -b DEBUG
+   ```
+4. **Deploy**: The resulting UEFI executable will be located at `Build/Shell/DEBUG_GCC/X64/VisualFileMan.efi`. Transfer this securely into your testing file system formatted in FAT32 or directly into your emulated OVMF VM storage to launch.