[GitHub Actions] Releases, minor changes

Formatting fixes.
Add comment about SSE2 builds not working on non-AVX(2) CPUs.
Don't build tests.
 Prepare artifacts:
  Switch to PowerShell.
  Rename xenia.exe to xenia-canary.exe.
 Add Releases:
  This allows GitHub Actions to have a link to the latest artifacts like AppVeyor, except not slow as fuck.
  Currently AVX-only since users will get confused which one to download (this is also why vfs-dump isn't included in the zip), and I don't know how to use the upload_url from another job configuration.
  Releases won't be created for PRs.

You can download the latest Release from here: https://github.com/xenia-canary/xenia-canary/releases/latest/download/xenia-canary.zip

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        cpu_arch: [SSE2, AVX, AVX2, AVX512]
+        cpu_arch: [SSE2, AVX, AVX2, AVX512] # SSE2 BUILDS WON'T WORK ON NON-AVX(2) CPUs!
     steps:
     - uses: actions/checkout@master
 
@@ -39,17 +39,44 @@ jobs:
       run: .\xb setup
 
     - name: Build
-      run: .\xb build --cpu_arch=${{matrix.cpu_arch}} --target=src\xenia-app --target=tests\xenia-cpu-ppc-tests --target=src\xenia-vfs-dump
+      run: .\xb build --cpu_arch=${{matrix.cpu_arch}} --target=src\xenia-app --target=src\xenia-vfs-dump
 
     - name: Prepare artifacts
       run: |
-          robocopy build\bin\Windows\Release artifacts xenia.exe xenia-vfs-dump.exe
+          ren build\bin\Windows\Release\xenia.exe xenia-canary.exe
+          robocopy build\bin\Windows\Release artifacts xenia*.exe
           robocopy . artifacts LICENSE
-          if errorlevel 8 exit /b 1
-          exit /b 0
-      shell: cmd
+          $LastExitCode = 0
+          cd artifacts
+          7z a ..\xenia-canary.zip LICENSE xenia-canary.exe
 
     - uses: actions/upload-artifact@master
       with:
         name: xenia-canary-${{matrix.cpu_arch}}
         path: artifacts
+
+    - name: Create Release
+      if: github.event.action != 'pull_request' && matrix.cpu_arch == 'AVX'
+      id: create_release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      with:
+        tag_name: tag-${{github.sha}}
+        release_name: xenia-canary-${{github.sha}}
+        body: |
+          Changes in this Release
+          - First Change
+          - Second Change
+
+    - name: Upload Release Asset
+      if: github.event.action != 'pull_request' && matrix.cpu_arch == 'AVX'
+      id: upload-release-asset
+      uses: actions/upload-release-asset@v1.0.1
+      env:
+        GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      with:
+        upload_url: ${{steps.create_release.outputs.upload_url}}
+        asset_path: ./xenia-canary.zip
+        asset_name: xenia-canary.zip
+        asset_content_type: application/zip