Add spring and factorialize

[maxonfjvipon]

PR-Codex overview

This PR focuses on optimizing the factorial calculation implementation in the Factorial class and updating the Spring Boot application to utilize this optimized implementation.

Detailed summary

• Replaced A class with Factorial class for factorial calculations.
• Updated Main class to use Factorial objects.
• Added MIT license headers to Factorial and FactorialApplication classes.
• Updated Spring Boot application entry point to use Factorial objects.
• Increased the total in the Makefile to 10,000,000.
• Updated versions of EO libraries.

The following files were skipped due to too many changes: Makefile, pom.xml

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[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 9min)

[0crat]

@maxonfjvipon Thanks for the contribution! You've earned +20 points for this. Please, keep them coming. .