Handle errors when loading project TMX files

[miurahr]

Refactor ProjectTMX constructors to improve error handling during TMX file loading. Log specific errors, such as parsing issues or general load failures, for better debugging. This change also introduces a clear separation between initialization and loading logic.

Pull request type

Please mark github LABEL of the type of change your PR introduces:

• Other (describe below)
  refactor to fix spotbugs warning

Which ticket is resolved?

What does this PR change?

• Ctor should not throw exception for a security reason.
• Bug description: https://spotbugs.readthedocs.io/en/stable/bugDescriptions.html#ct-be-wary-of-letting-constructors-throw-exceptions-ct-constructor-throw
• Introduce load method which can throw exception

Other information

CT: Be wary of letting constructors throw exceptions. (CT_CONSTRUCTOR_THROW)

Classes that throw exceptions in their constructors are vulnerable to Finalizer attacks

A finalizer attack can be prevented, by declaring the class final, using an empty finalizer declared as final, or by a clever use of a private constructor.

See SEI CERT Rule OBJ-11 for more information.

• pearent issue/pr chore: adjust spotbugs error level and exclude configuration, with CI change of annotation configuration on GitHub Actions Spotbugs task #1296