Add Project Opener extension

[孤独的Lonely (caolib)]

Extension Submission

Thanks for submitting your extension to the Command Palette Extensions Gallery!
Please fill out the checklist below to help us review your PR quickly.

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 SVG, 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/URL)
• I have read the Contributing Guide

Additional context

[Copilot]

Pull request overview

Adds a new Command Palette Extensions Gallery submission for caolib/project-opener, providing metadata and assets needed for gallery listing and install via Microsoft Store.

Changes:

• Added extension.json manifest for the new extension submission (metadata, tags/categories, install source).
• Added gallery assets: extension icon and a screenshot.

Reviewed changes

Copilot reviewed 1 out of 3 changed files in this pull request and generated 2 comments.

File	Description
extensions/caolib/project-opener/extension.json	New extension manifest defining id/title/descriptions, author info, icon, and MS Store install source.
extensions/caolib/project-opener/icon.png	Added extension icon referenced by the manifest.
extensions/caolib/project-opener/screenshots/01-main-view.png	Added screenshot asset under the optional screenshots/ folder.

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[孤独的Lonely (caolib)]

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