Remove duplicate macOS GUI build from build-gui matrix

[iiAtlas]

Problem

The macOS GUI is currently being built twice in our release workflows:

1. First build: In the build-gui job matrix (build-and-package.yml), macOS GUI is built on macos-latest and uploaded as an artifact
2. Second build: In the package job, GoReleaser runs with a before.hooks that calls ./scripts/build-wails.sh, which defaults to building macOS GUI again

Only the second build is actually used - the first build artifact is never downloaded by the package job.

Proposed Solution

Remove macOS from the build-gui matrix and rely on the GoReleaser hook to build it.

This makes the build flow:

• Linux/Windows GUI: Built on native platforms via build-gui job (required due to CGO + system libraries)
• macOS GUI: Built by GoReleaser hook on the macOS runner (where signing/notarization happens)

Rationale

1. Consistency with existing design: The signing/notarization hooks in .goreleaser.yaml already expect GoReleaser to build macOS
2. Simpler artifact handling: No need to coordinate downloading macOS artifacts
3. Performance: Saves ~10-15 minutes by eliminating duplicate macOS build
4. Clarity: Makes it obvious where each platform is built

Implementation

File: .github/workflows/build-and-package.yml

Remove the macOS entry from the build-gui matrix:

strategy:
  matrix:
    include:
      - name: linux-amd64
        os: ubuntu-22.04
        platforms: linux/amd64
        cc: gcc
        artifact-name: gui-linux-amd64
      - name: linux-arm64
        os: ubuntu-22.04-arm
        platforms: linux/arm64
        cc: gcc
        artifact-name: gui-linux-arm64
      # Remove this entry:
      # - name: macos
      #   os: macos-latest
      #   platforms: darwin/amd64,darwin/arm64
      #   cc: ""
      #   artifact-name: gui-macos
      - name: windows
        os: windows-latest
        platforms: windows/amd64
        cc: ""
        artifact-name: gui-windows

No changes needed to .goreleaser.yaml - it already has the build hook configured correctly.

Benefits

• 🚀 Faster CI (eliminates duplicate build)
• 🧹 Cleaner artifact handling
• ✅ No functional changes (same binaries produced)
• 📦 Maintains existing signing/notarization flow

Related Files

• .github/workflows/build-and-package.yml (build-gui matrix)
• .goreleaser.yaml (before.hooks that builds macOS)
• scripts/build-wails.sh (defaults to darwin platforms)