Add structured Bug Report Issue Template (Fixes #6763)

[Nihhaar0002]

This PR introduces a new GitHub Issue Template specifically for reporting bugs.

• Matches the structure shown in issue Provide a brief, clear description of the bug #6763
• Adds clear sections for Summary, Environment, Steps, Expected vs. Actual behavior
  -Includes fields for configuration files, logs, screenshots, and additional context

This helps contributors report bugs more accurately and improves issue triaging for maintainers.

Fixes #6763
Let me know if you'd like any additional fields or formatting changes. Happy to update!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.51%. Comparing base (1c6026e) to head (6a0234f).

Files with missing lines	Patch %	Lines
...va/com/thealgorithms/ciphers/OneTimePadCipher.java	86.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7115   +/-   ##
=========================================
  Coverage     78.50%   78.51%           
- Complexity     6752     6758    +6     
=========================================
  Files           759      760    +1     
  Lines         22402    22417   +15     
  Branches       4400     4402    +2     
=========================================
+ Hits          17587    17600   +13     
- Misses         4109     4110    +1     
- Partials        706      707    +1     

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