ci: split build workflow into composite actions

Signed-off-by: Seth Flynn <getchoo@tuta.io>

.github/actions/setup-dependencies/windows/action.yml

@@ -0,0 +1,85 @@
+name: Setup Windows Dependencies
+
+inputs:
+  build-type:
+    description: Type for the build
+    required: true
+    default: Debug
+  msystem:
+    description: MSYS2 subsystem to use
+    required: false
+  vcvars-arch:
+    description: Visual Studio architecture to use
+    required: true
+    default: amd64
+
+runs:
+  using: composite
+
+  steps:
+    # NOTE: Installed on MinGW as well for SignTool
+    - name: Enter VS Developer shell
+      if: ${{ runner.os == 'Windows' }}
+      uses: ilammy/msvc-dev-cmd@v1
+      with:
+        arch: ${{ inputs.vcvars-arch }}
+        vsversion: 2022
+
+    - name: Setup MSYS2 (MinGW-64)
+      if: ${{ inputs.msystem != '' }}
+      uses: msys2/setup-msys2@v2
+      with:
+        msystem: ${{ inputs.msystem }}
+        update: true
+        install: >-
+          git
+          mingw-w64-x86_64-binutils
+        pacboy: >-
+          toolchain:p
+          cmake:p
+          extra-cmake-modules:p
+          ninja:p
+          qt6-base:p
+          qt6-svg:p
+          qt6-imageformats:p
+          quazip-qt6:p
+          ccache:p
+          qt6-5compat:p
+          qt6-networkauth:p
+          cmark:p
+
+    - name: Force newer ccache (MSVC)
+      if: ${{ inputs.msystem == '' && inputs.build-type == 'Debug' }}
+      shell: bash
+      run: |
+        choco install ccache --version 4.7.1
+
+    - name: Configure ccache (MSVC)
+      if: ${{ inputs.msystem == '' && inputs.build-type == 'Debug' }}
+      shell: pwsh
+      run: |
+        # https://github.com/ccache/ccache/wiki/MS-Visual-Studio (I coudn't figure out the compiler prefix)
+        Copy-Item C:/ProgramData/chocolatey/lib/ccache/tools/ccache-4.7.1-windows-x86_64/ccache.exe -Destination C:/ProgramData/chocolatey/lib/ccache/tools/ccache-4.7.1-windows-x86_64/cl.exe
+        echo "CLToolExe=cl.exe" >> $env:GITHUB_ENV
+        echo "CLToolPath=C:/ProgramData/chocolatey/lib/ccache/tools/ccache-4.7.1-windows-x86_64/" >> $env:GITHUB_ENV
+        echo "TrackFileAccess=false" >> $env:GITHUB_ENV
+        # Needed for ccache, but also speeds up compile
+        echo "UseMultiToolTask=true" >> $env:GITHUB_ENV
+
+    - name: Retrieve ccache cache (MinGW)
+      if: ${{ inputs.msystem != '' && inputs.build-type == 'Debug' }}
+      uses: actions/cache@v4.2.3
+      with:
+        path: '${{ github.workspace }}\.ccache'
+        key: ${{ runner.os }}-mingw-w64-ccache-${{ github.run_id }}
+        restore-keys: |
+          ${{ runner.os }}-mingw-w64-ccache
+
+    - name: Setup ccache (MinGW)
+      if: ${{ inputs.msystem != '' && inputs.build-type == 'Debug' }}
+      shell: msys2 {0}
+      run: |
+        ccache --set-config=cache_dir='${{ github.workspace }}\.ccache'
+        ccache --set-config=max_size='500M'
+        ccache --set-config=compression=true
+        ccache -p  # Show config