Switched to Raylib

- Added Raylib due to being simple and similar to XNA's APIs
- Remove ifdef cplusplus from filehandler
- Added VSCode, GH Actions and FetchTSO

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+name: Build
+
+on:
+    push:
+        branches: [main, dev]
+    pull_request:
+        branches: [main, dev]
+
+jobs:
+  build:
+    timeout-minutes: 15
+    continue-on-error: true
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{matrix.os}}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: goto-bus-stop/setup-zig@v2
+      - name: Build
+        run: zig build
+      - name: Test
+        run: zig build test
+  lint:
+    timeout-minutes: 15
+    continue-on-error: true
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: goto-bus-stop/setup-zig@v2
+      - run: zig fmt --check .