feat: add Windows support via WSL bridge

[aniongithub]

Summary

Adds Windows support for devcontainer-mcp using the WSL stdio bridge — no native Windows binary needed.

Changes

• install.ps1 (new) — PowerShell installer for Windows:

  • Verifies WSL is available
  • Installs the Linux binary inside WSL (reuses install.sh)
  • Configures Windows-side MCP clients (Claude Code, Copilot, VS Code, Cursor) with "command": "wsl" bridge
  • Installs SKILL.md to Windows-side agent discovery dirs
  • Detects backend CLIs available in WSL

• install.sh — Added --skip-mcp-config flag so install.ps1 can delegate binary installation to WSL without configuring Linux-side MCP clients

• release.yml — Uploads install.ps1 alongside install.sh as a release asset

• README.md — Added Windows install one-liner and WSL MCP config example

How it works

MCP clients on Windows launch the server via WSL:

{
  "mcpServers": {
    "devcontainer-mcp": {
      "command": "wsl",
      "args": ["~/.local/bin/devcontainer-mcp", "serve"]
    }
  }
}

The stdio transport works transparently across the WSL boundary. Zero Rust code changes needed.

Install command (Windows)

Invoke-RestMethod https://github.com/aniongithub/devcontainer-mcp/releases/latest/download/install.ps1 | Invoke-Expression