Add Windows quick start guide for new contributors

docs/windows_quick_start.md

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+# Windows Quick Start Guide
+
+> A simplified and beginner-friendly version of Anki’s official Windows documentation.
+> Ideal for first-time contributors building Anki on Windows.
+
+---
+
+## Minimum Requirements
+
+- **64-bit Windows 10** (version 1703 or newer)
+- Administrator access to install software
+
+---
+
+## Step 1 – Install Rust (rustup)
+
+Anki uses the **Rust programming language** for parts of its codebase.
+
+1. Visit the official Rust website
+2. Download and install **rustup**
+3. During installation, accept the default options
+
+> **Windows ARM users**  
+> After installing rustup, run the following command in a terminal, inside the project folder:
+>
+> ```bash
+> rustup target add x86_64-pc-windows-msvc
+> ```
+
+---
+
+## Step 2 – Install Visual Studio
+
+1. Download **Visual Studio Community Edition**
+2. Open the installer
+3. Select:
+   -  **Desktop Development with C++**
+4. Leave the advanced options unchanged
+
+> **Note**  
+>  This step is required to compile native parts of the project.
+
+---
+
+## Step 3 – Install MSYS2
+
+1. Visit the [MSYS2](https://www.msys2.org/) website
+2. Install it in the default location
+3. After installation, open the MSYS2 terminal
+4. Run the following command:
+
+```bash
+pacman -S git rsync
+```
+
+---
+
+## Step 4 – Configure the PATH Environment Variable
+
+1. Open **Windows Environment Variables**
+2. Edit the **PATH** variable
+3. Add the following path:
+
+```text
+C:\msys64\usr\bin
+```
+
+4. Reboot your computer
+
+>  **Important note**  
+> If you already use **Git for Windows** (for example, [posh-git](https://github.com/dahlbyk/posh-git) in PowerShell), it may conflict with the MSYS2 Git.
+>
+> - Prefer using [Git for Windows](https://gitforwindows.org/)
+> - Ensure the `rsync` command is available
+
+---
+
+## Step 5 – Choose a Good Source Code Location
+
+To avoid build issues:
+
+-  Avoid long directory paths
+-  Avoid spaces in folder names
+
+ **Recommended**:
+```text
+C:\anki
+```
+
+ **Problematic**:
+```text
+C:\Users\Your Name\Documents\Projects\Anki Source Code
+```
+
+---
+
+## Audio Support (Optional)
+
+To play and record audio during development, ensure the following executables are available in your **PATH**:
+
+- `mpv.exe`
+- `lame.exe`
+
+---
+
+## Common Problems
+
+###  Build errors
+- Make sure Visual Studio was installed with **Desktop Development with C++**
+
+###  `git` command not found
+- Verify that the PATH variable is configured correctly
+
+###  Issues caused by spaces in paths
+- Move the project to a shorter path, such as `C:\anki`
+
+---
+
+## Next Steps
+
+For advanced topics such as running tests or building wheels, see:
+
+- `development.md`
+
+---
+
+> **Note**  
+> This guide does not replace the official documentation. It is intended to make the first steps easier for new Anki contributors on Windows.
+