splitting build and tests into separate workflows

.github/workflows/Build.yml

@@ -13,10 +13,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: mlugg/setup-zig@v2
       with:
-        version: 0.15.1
+        version: 0.15.2
 
     - name: Building
       run: zig build
-
-    - name: Test
-      run: zig build test-soft