refactor: review and group scattered palindrome implementation

[priyanshuvishwakarma273403]

Description

This PR addresses issue #7456 by reorganizing the palindrome-checking utility classes into their correct packages and cross-referencing them using Javadoc @see annotations.

Related Issue

Fixes #7456

Changes Made

• Moved LowestBasePalindrome and its test from others/ to maths/.
• Moved PalindromeSinglyLinkedList and its test from misc/ to datastructures/lists/.
• Moved PalindromePrime and its test from misc/ to maths/.
• Added Javadoc @see tags cross-referencing all 7 palindrome implementations across the codebase for better discoverability.

Checklist

• Code compiles successfully.
• Files relocated to appropriate packages.
• Unit tests passed.
• Cross-references added to class Javadocs.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.89%. Comparing base (0e001b7) to head (a516bb5).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7487   +/-   ##
=========================================
  Coverage     79.89%   79.89%           
+ Complexity     7345     7342    -3     
=========================================
  Files           809      809           
  Lines         23850    23850           
  Branches       4699     4699           
=========================================
  Hits          19055    19055           
+ Misses         4036     4035    -1     
- Partials        759      760    +1     

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[priyanshuvishwakarma273403]

hi @maintainer please review this pull request.
thank you.