Added the implementation of insertion of values and traversal of Binary Search Tree(BST)

[aaryab27]

• A simple implementation of a Binary Search Tree (BST) in Java.
• Supports insertion and tree traversals: inorder, preorder, and postorder.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 47 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.57%. Comparing base (9484c7e) to head (94489a2).
⚠️ Report is 4 commits behind head on update-directory.

Files with missing lines	Patch %	Lines
.../java/com/thealgorithms/tree/BinarySearchTree.java	0.00%	47 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                   @@
##             update-directory    #6683      +/-   ##
======================================================
- Coverage               75.75%   75.57%   -0.18%     
  Complexity               5772     5772              
======================================================
  Files                     703      704       +1     
  Lines                   19777    19824      +47     
  Branches                 3832     3835       +3     
======================================================
  Hits                    14982    14982              
- Misses                   4215     4262      +47     
  Partials                  580      580              

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