Support for MinGW

[kojix2]

Hello.
Crystal was recently added to MinGW. is there any plan to support MinGW in install-crystal?

[kojix2]

For those who came here looking for information, I’ve summarized my current workaround below.

  build_MinGW64:
    name: MinGW64
    runs-on: windows-latest
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: true
      - uses: msys2/setup-msys2@v2
        with:
          msystem: MINGW64
          update: true
          install: >-
            mingw-w64-x86_64-crystal
            mingw-w64-x86_64-shards
      - name: Install dependencies
        shell: msys2 {0}
        run: shards install
      - name: Run tests
        shell: msys2 {0}
        run: crystal spec
      - name: Build executable
        shell: msys2 {0}
        run:  shards build