feat(packaging): add deb and rpm desktop targets

[bigpod98]

What Changed

Added additional outputs to packaging script.

Why

Allows output of 2 linux packaging systems Deb and RPM
issue #4030

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

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Note

Low Risk
Packaging and metadata-only changes to the build script with tests; no runtime app or auth logic touched.

Overview
Adds Linux .deb and .rpm packaging entry points via dist:desktop:deb and dist:desktop:rpm, writing artifacts to packaging-output/ (also gitignored).

The desktop artifact script now sets electron-builder Linux distribution fields (maintainer, vendor, synopsis, syncDesktopName) for all Linux targets, and when the target is deb, declares explicit deb.depends on common GTK/NSS/secret/audio libraries. The staged build package.json picks up richer product metadata (homepage, license, desktopName, description, author email) so package managers get proper labels.

Coverage includes a unit test asserting deb Linux config and dependency list.

^{Reviewed by Cursor Bugbot for commit 6f2eac5. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add deb and rpm npm build scripts for Linux desktop packaging

• Adds dist:desktop:deb and dist:desktop:rpm npm scripts in package.json that invoke scripts/build-desktop-artifact.ts for x64 Linux builds, outputting to packaging-output/.
• Linux build configs now include maintainer, vendor, synopsis, and syncDesktopName. For deb targets, a deb.depends list is set covering GTK, NSS, libsecret, and other required system libraries.
• The staged package.json used during builds is updated with homepage, license, desktopName, a richer description, and author email.

^{Macroscope summarized 6f2eac5.}

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[macroscopeapp]

Approvability

Verdict: Approved

Build/packaging configuration only - adds Linux deb/rpm package metadata and dependencies with no runtime behavior changes. Test coverage included for the new configuration.

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Dismissing prior approval to re-evaluate 03b684c