Create LinkedListSort.java

[sambricker216]

Describe your change:

Added methods to merge sort LinkedList if the type is int or float.

• [X ] Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

References

#2450

Checklist:

• [X ] I have read CONTRIBUTING.md.
• [X ] This pull request is all my own work -- I have not plagiarized.
• [X ] I know that pull requests will not be merged if they fail the automated tests.
• [X ] All new Java files are placed inside an existing directory.
• [X ] All filenames are in all uppercase characters with no spaces or dashes.
• [X ] All functions and variable names follow Java naming conventions.

[siriak]

Already implemented here https://github.com/TheAlgorithms/Java/blob/857c4aafb27f2d1a3db41dd393c90e07a9d656b4/src/main/java/com/thealgorithms/sorts/LinkList_Sort.java