Add a gh workflow to create a packed version of the library

Author: mintsuki

.github/workflows/pack.yml

@@ -0,0 +1,29 @@
+name: Pack cc-runtime
+
+on: [push]
+
+jobs:
+  pack:
+    name: Pack cc-runtime
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Pack cc-runtime
+        run: |
+          set -e
+          cat assembly.h int_util.h int_endianness.h int_types.h int_lib.h *.inc *.c > /tmp/cc-runtime.c
+          sed -i '/#include/d' /tmp/cc-runtime.c
+
+      - name: Push packed cc-runtime
+        run: |
+          set -ex
+          git config user.name 'mintsuki'
+          git config user.email '[email protected]'
+          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/osdev0/cc-runtime.git
+          git fetch --all
+          git checkout packed || git checkout --orphan packed
+          rm -rf .github *.c *.h *.inc
+          mv /tmp/cc-runtime.c ./
+          git add -f .
+          git commit -m "Push packed cc-runtime.c"
+          git push origin packed