docs: add acknowledgements

ACKNOWLEDGEMENTS.md

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+# Acknowledgements
+
+I hope you have found this project useful. All the major credit really goes to the topgg, dblstatistics, also overwatch.wtf which allows this services to operate.
+
+- [topgg](https://top.gg)
+- [dblstatistics](dblstatistics.com)
+- [overwatchtwf](https://overwatch.wtf)
+
+The core of modules:
+- [express](https://github.com/expressjs/express)
+- [cheerio](https://cheerio.js.org)