Add neilsawhney.powerqalc to gallery

[Neil-Sawhney]

Extension Submission

Adds PowerQalc — a Command Palette calculator powered by the Qalculate engine (qalc). Evaluate mixed-unit expressions, convert results, solve equations, and copy answers without leaving the launcher.

• Extension ID: neilsawhney.powerqalc
• Folder: extensions/neilsawhney/powerqalc/
• Install source: Microsoft Store (9MZR396NKKGW)
• Homepage: https://github.com/Neil-Sawhney/PowerQalc

Checklist

• My folder follows the <author>/<extension-name> convention (lowercase, alphanumeric + hyphens only)
• I have added an extension.json with all required fields
• The id field in my extension.json matches my folder path (author.extension-name)
• I have added an icon file (PNG or JPG, under 100 KB)
• The icon field in extension.json matches my icon filename
• My extension is available at the install source I specified (winget/MS Store)
• I have read the Contributing Guide

Additional context

Includes one screenshot (screenshots/01-main-view.png) showing the main calculator view.

Store listing is live; local validation passed against the extension schema.

[Neil-Sawhney]

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