Add support for macOS universal binary #348, #362

This commit introduces a universal binary format in the distributed MDG
files for macOS, improving support for both Apple Silicon (ARM) and
Intel (x64) architectures.

It uses `electron-builder` to package both architectures into a single
executable, ensuring the application can natively on any macOS hardware
without depending on the GitHub runners' architecture. It fixes the
issue related to prior releases that supported only the architecture of
the build environment itself, which is subject to change.

Changes:

- Update DMG distribution to include both ARM64 and x64 architectures.
- Enhance system requirements documentation to reflect support for both
  architectures.
- Modify CI/CD workflows to check desktop runtime errors for both ARM64
  and x64 versions on macOS.

Resolves:

- Issue #348: Initial request for Apple Silicon support.
- Issue #362: Correction of distribution limited to ARM64 in release
  0.13.3.

`electron-builder` support:
- electron-userland/electron-builder#5475
- electron-userland/electron-builder#5689
- electron-userland/electron-builder#5426

.github/workflows/checks.desktop-runtime-errors.yaml

@@ -9,9 +9,13 @@ jobs:
   run-check:
     strategy:
       matrix:
-        os: [ macos, ubuntu, windows ]
+        os:
+          - macos-latest  # Apple silicon (ARM64)
+          - macos-13      # Intel-based (x86-64)
+          - ubuntu-latest
+          - windows-latest
       fail-fast: false # Allows to see results from other combinations
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ${{ matrix.os }}
     steps:
       -
         name: Checkout
@@ -24,7 +28,7 @@ jobs:
         uses: ./.github/actions/npm-install-dependencies
       -
         name: Configure Ubuntu
-        if: matrix.os == 'ubuntu'
+        if: contains(matrix.os, 'ubuntu') # macOS runner is missing Docker
         shell: bash
         run: |-
           sudo apt update