chore: Integrate concrete-compiler to the mono-repo

compilers/concrete-compiler/docs/cpp_api/clientlib/server_example.cpp

@@ -0,0 +1,10 @@
+#include <concretelang/ServerLib/ServerLambda.h>
+
+void answer_client(MyConnection conn) {
+    std::istream from_client = conn.istream();
+    std::ostream to_client = conn.ostream();
+    auto err = serverLambda.read_call_write(serverInput, serverOutput);
+    if (err) {
+        throw MyException();
+    }
+}