SpringBoot Feature to support enable-preview main method

This commit support the differents ways write main methods in MainApplication.class to Launcher. This change support the traditional main Method:

public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
}

And support to the main method without arguments:

public static void main() {
    SpringApplication.run(Application.class);
}

Comment From: pivotal-cla

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Comment From: pivotal-cla

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Comment From: philwebb

Thanks for the PR, but since this feature is still in preview we'd prefer not to support it yet. Issue #35785 is tracking the feature as well as looking at unnamed classes.

Comment From: vulinh64

I do expect this to be production-ready in Java 25 🤞