feat: add serverfiles directory creation step

This commit adds a new step to the workflow that creates a "serverfiles" directory. This directory will be used for storing server-related files.

.github/workflows/details-check.yml

@@ -42,6 +42,9 @@ jobs:
       - name: Install dependencies
         run: sudo apt-get install libxml2-utils jq
 
+      - name: Create serverfiles directory
+        run: mkdir -p serverfiles
+
       - name: Grab server
         run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./linuxgsm.sh ${{ matrix.shortname }}server