Mark repository as archived and suggest alternative

Updated README to indicate repository is archived and suggested alternative.

Author: tomasMizera

README.md

@@ -1,17 +1,15 @@
+**This repository is archived and no longer maintained. Please use [Mergin Maps Python Client](https://github.com/MerginMaps/python-api-client) instead.**
+
 [![Code Layout](https://github.com/MerginMaps/cpp-api-client/workflows/Code%20Layout/badge.svg)](https://github.com/MerginMaps/cpp-api-client/actions?query=workflow%3A%22Code+Layout%22)
 [![Linux Build](https://github.com/MerginMaps/cpp-api-client/actions/workflows/linux.yml/badge.svg)](https://github.com/MerginMaps/cpp-api-client/actions/workflows/linux.yml)
 [![Windows Build](https://github.com/MerginMaps/cpp-api-client/actions/workflows/windows.yml/badge.svg)](https://github.com/MerginMaps/cpp-api-client/actions/workflows/windows.yml)
 [![macOS Build](https://github.com/MerginMaps/cpp-api-client/actions/workflows/macos.yml/badge.svg)](https://github.com/MerginMaps/cpp-api-client/actions/workflows/macos.yml)
 
-# Mergin Maps Cpp Client
+# Mergin Maps Cpp Client [Archived]
 
 This repository contains a cpp client module for access to [MerginMaps](https://merginmaps.com/)
 service and a command-line tool for easy access to data stored in Mergin Maps.
 
-<div><img align="left" width="45" height="45" src="https://raw.githubusercontent.com/MerginMaps/docs/main/src/.vuepress/public/slack.svg"><a href="https://merginmaps.com/community/join">Join our community chat</a><br/>and ask questions!</div><br />
-
-Note: Check also [Mergin Maps Python Client](https://github.com/MerginMaps/python-api-client)
-
 ## Command-line Tool
 
 When the client is installed, it comes with `mergin` command line tool.