Add TitleCase Implementation

[Rosander0]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new algorithms include a corresponding test class that validates their functionality.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.87%. Comparing base (bf0ff70) to head (f0b39dd).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7473      +/-   ##
============================================
+ Coverage     79.86%   79.87%   +0.01%     
- Complexity     7328     7337       +9     
============================================
  Files           807      808       +1     
  Lines         23817    23834      +17     
  Branches       4687     4691       +4     
============================================
+ Hits          19021    19038      +17     
- Misses         4035     4036       +1     
+ Partials        761      760       -1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Rosander0]

Hey folks, just checking in on this PR — it's been a few days. Happy to make any changes if something needs to be adjusted. Let me know!

[Copilot]

Pull request overview

This PR introduces a new string utility for converting input text into title case within com.thealgorithms.strings, along with a JUnit test suite to validate the behavior.

Changes:

• Added TitleCase.toTitleCase(String) utility to capitalize the first letter of each word and lowercase the remaining letters.
• Added TitleCaseTest covering null/empty input, single/multiple words, and whitespace preservation.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/main/java/com/thealgorithms/strings/TitleCase.java	Adds the TitleCase utility implementation for title-casing strings.
src/test/java/com/thealgorithms/strings/TitleCaseTest.java	Adds unit tests validating TitleCase.toTitleCase behavior across common input shapes.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.