add comprehensive documentation (#9537)

docs/misc/alpine-tools.func/ALPINE_TOOLS_FUNC_USAGE_EXAMPLES.md

@@ -0,0 +1,19 @@
+# alpine-tools.func Usage Examples
+
+Examples for Alpine tool installation.
+
+### Example: Alpine Setup with Tools
+
+```bash
+#!/usr/bin/env bash
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+
+apk_update
+setup_nodejs "20"
+setup_php "8.3"
+setup_mariadb "11"
+```
+
+---
+
+**Last Updated**: December 2025