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.

srclib/libhelper/src/Checkers.cpp

@@ -74,8 +74,8 @@ bool isHardLink(const std::string_view entry)
 
 bool areLinked(const std::string_view entry1, const std::string_view entry2)
 {
-	const std::string_view st1 = (isSymbolicLink(entry1)) ? readSymlink(entry1) : entry1;
-	const std::string_view st2 = (isSymbolicLink(entry2)) ? readSymlink(entry2) : entry2;
+	const std::string st1 = (isSymbolicLink(entry1)) ? readSymlink(entry1) : std::string(entry1.data());
+	const std::string st2 = (isSymbolicLink(entry2)) ? readSymlink(entry2) : std::string(entry2.data());
 
 	return (st1 == st2);
 }