fix cursor plugin on windows

[itsdouges]

This abuses the fact that one of the env variables aren't defined in Windows / macOS / Linux. This won't work for any Windows users who have ${HOME} defined, but generally that's a small subset from the overall users vs. none working on Windows currently.

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Note

Low Risk
Plugin packaging and MCP launch configuration only; no runtime app or security-sensitive logic changes.

Overview
Bumps the Paper Cursor plugin to 0.2.2 and fixes MCP startup on Windows by changing how the Paper CLI path is resolved in mcp.cursor.json.

The MCP command no longer uses ${userHome}; it uses ${env:HOME}${env:USERPROFILE} so the path expands to the user home on Unix (HOME) or Windows (USERPROFILE), with the other variable empty. The binary path remains ~/.paper/bin/paper with mcp args.

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[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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