Add .wslconfig with WSL2 resource limits and localhost forwarding

[Copilot]

Adds WSL2 configuration file to set memory/CPU limits and enable localhost forwarding.

Changes

• .wslconfig: New file with WSL2 settings (8GB memory, 4 CPUs, 4GB swap, localhost forwarding)
• post-install.ps1: Copy .wslconfig to $env:USERPROFILE\.wslconfig during installation with path validation
• README.md: Download step for .wslconfig in installation script; documented settings in "What's Included"

The .wslconfig file will be automatically deployed to the user's home directory where WSL2 reads configuration at startup.

# Added to installation flow
if (Test-Path '.wslconfig') { Remove-Item -Path '.wslconfig' -Force }; 
Invoke-WebRequest -Uri 'https://raw.githubusercontent.com/.../wslconfig' -OutFile '.wslconfig' -Headers @{"Cache-Control"="no-cache"};

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Customize .wslconfig</issue_title>
<issue_description>Use the following configuration

[wsl2]
memory=8GB # Limits VM memory
processors=4 # Limits number of CPUs
swap=4GB # Optional swap size
localhostForwarding=true
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Customize .wslconfig #10

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