Add RemoveStars string algorithm

[SYEDMDSAAD]

Feature Added

Added string algorithm:

1. RemoveStars
   Removes characters affected by '*' in a string.

Example:
Input: leet**cod*e
Output: lecoe

The implementation follow repository coding standards and compile successfully.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.28%. Comparing base (dfa6bf0) to head (91c8a73).

Files with missing lines	Patch %	Lines
...in/java/com/thealgorithms/strings/RemoveStars.java	0.00%	10 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7273      +/-   ##
============================================
- Coverage     79.31%   79.28%   -0.04%     
- Complexity     6988     6989       +1     
============================================
  Files           781      782       +1     
  Lines         22958    22968      +10     
  Branches       4510     4513       +3     
============================================
+ Hits          18209    18210       +1     
- Misses         4020     4030      +10     
+ Partials        729      728       -1     

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