Run unit tests under the building architecture

This also removed the need for `@intCase()`
Also move the making directories and copying to a script to the build is simpler.

Install qemu earler
Added chmod +x
Fixed copy elf


Added missing switch for qemu binary


Spelling


Make makeiso.sh executable

No longer chmod makeiso.sh

Use the cache root to set the output directory

.github/workflows/main.yml

@@ -19,14 +19,14 @@ jobs:
         wget $(curl -s 'https://ziglang.org/download/index.json' | python3 -c "import sys, json; print(json.load(sys.stdin)['master']['x86_64-linux']['tarball'])")
         sudo apt-get install mtools
         tar -xvf zig*
-    - name: Build kernel
-      run: zig*/zig build ${{ matrix.build_mode }}
-    - name: Run unit tests
-      run: zig*/zig build test ${{ matrix.build_mode }}
     - name: Install qemu
       run: |
         sudo apt-get update
         sudo apt-get install qemu qemu-system --fix-missing
+    - name: Build kernel
+      run: zig*/zig build ${{ matrix.build_mode }}
+    - name: Run unit tests
+      run: zig*/zig build test ${{ matrix.build_mode }}
     - name: Run runtime tests
       run: zig*/zig build test -Drt-test=true ${{ matrix.build_mode }}
     - name: Check formatting