Update example CMakeList to force default CMAKE_BUILD_TYPE (#416)

Signed-off-by: eProsima <jesuspoderoso@eprosima.com>

Author: JesusPoderoso

src/main/java/com/eprosima/fastdds/idl/templates/CMakeLists.stg

@@ -16,6 +16,22 @@ group CMakeLists;
 
 cmakelists(solution, test) ::= <<
 
+$if (solution)$
+# Copyright 2024 Proyectos y Sistemas de Mantenimiento SL (eProsima).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+$endif$
+
 cmake_minimum_required(VERSION 3.20)
 
 project("generated_code")
@@ -41,6 +57,17 @@ $endif$
 find_package(fastcdr REQUIRED)
 find_package(fastdds 3 REQUIRED)
 
+$if (solution)$
+# Set CMAKE_BUILD_TYPE to Release by default.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    message(STATUS "Setting build type to 'Release' as none was specified.")
+    set(CMAKE_BUILD_TYPE Release CACHE STRING
+        "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
+        FORCE)
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
+$endif$
+
 $solution.projects : { project | $pub_sub_execs(project=project, libraries=solution.libraries, test=test)$}; separator="\n"$
 
 $if (test)$