added base CI workflows

.github/workflows/deploy_retro_android.yml

@@ -0,0 +1,8 @@
+name: Build Android (Libretro)
+on: [push,pull_request]
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/[email protected] 

.github/workflows/deploy_retro_ios.yml

@@ -0,0 +1,36 @@
+name: Build iOS (Libretro)
+on: [push,pull_request]
+jobs:
+  build-and-deploy:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/[email protected] 
+      - name: Configure & Build 🔧 
+        run: |
+          mkdir build
+          cd build
+          cmake -GXcode -DCMAKE_SYSTEM_NAME=iOS ../
+          cmake --build . --config Release
+          mkdir Payload
+          cp -R libSkyEmuRetro.dylib Payload/SkyEmu.app
+          zip -r SkyEmuRetro.ipa Payload
+      - name: GH Release 🚀
+        # You may pin to the exact commit or the version.
+        uses: actions/upload-artifact@v2
+        with:
+           name: iOSRelease (Libretro)
+           path: build/SkyEmu.ipa
+        #uses: softprops/[email protected]
+        #with:
+        #  # Note-worthy description of changes in release
+        #  # body: # optional
+        #  # Path to load note-worthy description of changes in release from
+        #  # body_path: # optional
+        #  # Gives the release a custom name. Defaults to tag name
+        #  name: LinuxRelease
+        #  # Identify the release as a prerelease. Defaults to false
+        #  prerelease: True
+        #  # Newline-delimited list of path globs for asset files to upload
+        #  files: build/bin/*
+

.github/workflows/deploy_retro_linux.yml

@@ -0,0 +1,33 @@
+name: Build Linux (Libretro)
+on: [push,pull_request]
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/[email protected] 
+      - name: Configure & Build 🔧 
+        run: |
+          mkdir build
+          cd build
+          cmake .. && cmake --build .
+          
+      - name: GH Release 🚀
+        # You may pin to the exact commit or the version.
+        uses: actions/upload-artifact@v2
+        with:
+           name: LinuxRelease
+           path: libSkyEmuRetro.so
+        #uses: softprops/[email protected]
+        #with:
+        #  # Note-worthy description of changes in release
+        #  # body: # optional
+        #  # Path to load note-worthy description of changes in release from
+        #  # body_path: # optional
+        #  # Gives the release a custom name. Defaults to tag name
+        #  name: LinuxRelease
+        #  # Identify the release as a prerelease. Defaults to false
+        #  prerelease: True
+        #  # Newline-delimited list of path globs for asset files to upload
+        #  files: build/bin/*
+

.github/workflows/deploy_retro_mac.yml

@@ -0,0 +1,41 @@
+name: Build macOS (Libretro)
+on: [push,pull_request]
+jobs:
+  build-and-deploy:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/[email protected] 
+      - name: Configure & Build 🔧 
+        run: |
+          mkdir build
+          cd build
+          cmake .. && cmake --build .
+      - name: Build DMG
+        run: |
+          cd build
+          brew install graphicsmagick imagemagick
+          pip install setuptools
+          npm install --global create-dmg
+          create-dmg --dmg-title=SkyEmu 'libSkyEmuRetro.dylib' || true
+          ls 
+          mv SkyEmu*.dmg "SkyEmu.dmg"
+      - name: GH Release 🚀
+        # You may pin to the exact commit or the version.
+        uses: actions/upload-artifact@v2
+        with:
+           name: MacOSRelease
+           path: build/SkyEmu.dmg
+        #uses: softprops/[email protected]
+        #with:
+        #  # Note-worthy description of changes in release
+        #  # body: # optional
+        #  # Path to load note-worthy description of changes in release from
+        #  # body_path: # optional
+        #  # Gives the release a custom name. Defaults to tag name
+        #  name: LinuxRelease
+        #  # Identify the release as a prerelease. Defaults to false
+        #  prerelease: True
+        #  # Newline-delimited list of path globs for asset files to upload
+        #  files: build/bin/*
+

.github/workflows/deploy_retro_win.yml

@@ -0,0 +1,38 @@
+name: Build Windows (Libretro)
+on: [push,pull_request]
+jobs:
+  build-and-deploy:
+    runs-on: windows-2019
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/[email protected] 
+      - name: Get latest CMake and ninja
+        # Using 'latest' branch, the most recent CMake and ninja are installed.
+        uses: lukka/get-cmake@latest
+
+      - name: Build 🔧 
+        run: |
+          mkdir build
+          cd build
+          cmake -G "Visual Studio 16 2019" -A x64 -DCMAKE_SYSTEM_VERSION=10.0.19041.0 ..
+          cmake --build . --config Release
+          
+      - name: GH Release 🚀
+        # You may pin to the exact commit or the version.
+        uses: actions/upload-artifact@v2
+        with:
+           name: WindowsRelease
+           path: build/libSkyEmuRetro.dll
+        #uses: softprops/[email protected]
+        #with:
+        #  # Note-worthy description of changes in release
+        #  # body: # optional
+        #  # Path to load note-worthy description of changes in release from
+        #  # body_path: # optional
+        #  # Gives the release a custom name. Defaults to tag name
+        #  name: LinuxRelease
+        #  # Identify the release as a prerelease. Defaults to false
+        #  prerelease: True
+        #  # Newline-delimited list of path globs for asset files to upload
+        #  files: build/bin/*
+