pmt: Improvement.

- At build time, the version, compile time, CMake version, compiler version, and compiler flags are retrieved with the new CMake module and a header is created. This header provides more robust version management and notifications.
- Build warnings fixed, code corrected for compilation.
- Improvements were made to CMake code.
- Modifications were made to the tests to read the library's version information.

cmake/generate_headers.cmake

@@ -0,0 +1,30 @@
+#
+#  Copyright 2025 Yağız Zengin
+#
+#  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.
+#
+
+# Generate build info (version.hpp.in)
+function(generateBuildInfo BUILD_FLAGS)
+	string(TIMESTAMP BUILD_DATE "%Y-%m-%d")
+	string(TIMESTAMP BUILD_TIME "%H:%M:%S")
+
+	execute_process(COMMAND bash -c "mkdir -p ${CMAKE_SOURCE_DIR}/include/generated &>/dev/null")
+	execute_process(COMMAND bash -c "${CMAKE_CXX_COMPILER} --version | head -n 1"
+		OUTPUT_VARIABLE COMPILER_VERSION_STRING
+		OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+	configure_file(${CMAKE_SOURCE_DIR}/include/buildInfo.hpp.in ${CMAKE_SOURCE_DIR}/include/generated/buildInfo.hpp @ONLY)
+
+	message(STATUS "Generated header: ${CMAKE_SOURCE_DIR}/include/generated/buildInfo.hpp")
+endfunction()