feat: add serverlist game icon validation

This commit adds a new script `serverlist-validate-game-icons.sh` that checks if all the game servers listed in `serverlist.csv` have a corresponding `shortname-icon.png` file. It also verifies that the number of game icons matches the number of servers in `serverlist.csv`. The script is executed as part of the workflow defined in `serverlist-validate.yml`.

Co-authored-by: [co-author-name]

.github/workflows/serverlist-validate-game-icons.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+cd "lgsm/data" || exit
+
+echo ""
+echo "Checking that all the game servers listed in serverlist.csv have a shortname-icon.png file"
+for shortname in $(tail -n +2 serverlist.csv | cut -d ',' -f1); do
+	# check if $shortname-icon.png exists
+	if [ ! -f "gameicons/${shortname}-icon.png" ]; then
+		echo "ERROR: gameicons/${shortname}-icon.png does not exist"
+		exitcode=1
+	else
+		echo "OK: gameicons/${shortname}-icon.png exists"
+	fi
+done
+
+# check that the number of gameicons matches the number of servers in serverlist.csv
+echo ""
+echo "Checking that the number of gameicons matches the number of servers in serverlist.csv"
+gameiconcount="$(ls -1 gameicons | wc -l)"
+serverlistcount="$(tail -n +2 serverlist.csv | wc -l)"
+if [ "${gameiconcount}" -ne "${serverlistcount}" ]; then
+	echo "ERROR: game icons (${gameiconcount}) does not match serverlistcount ($serverlistcount)"
+	exitcode=1
+else
+	echo "OK: gameiconcount ($gameiconcount) matches serverlistcount ($serverlistcount)"
+fi
+
+exit ${exitcode}

.github/workflows/serverlist-validate.yml

@@ -12,3 +12,6 @@ jobs:
 
       - name: Compare Versions
         run: chmod +x .github/workflows/serverlist-validate.sh; .github/workflows/serverlist-validate.sh
+
+      - name: Validate Game Icons
+        run: chmod +x .github/workflows/serverlist-validate-game-icons.sh; .github/workflows/serverlist-validate-game-icons.sh