feat: add IsPalindrome snippet with unit test and README entry

[tarun2684]

Description

This PR adds a new Kotlin snippet IsPalindrome.kt to the codecollection.snippets.strings package.
The function checks whether a given string is a palindrome, ignoring punctuation and spacing.

Changes:

• Added: src/main/kotlin/codecollection/snippets/strings/IsPalindrome.kt
• Added: src/test/kotlin/codecollection/snippets/strings/IsPalindromeTest.kt
• Updated: README.md with an entry for the new snippet
• Minor: Fixed import order in the test file to pass KtLint check

Related Issue

Closes #18

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Let me know if any further changes are needed!

[e5LA]

Thanks for taking the time to contribute👏

[e5LA]

For consistency with the rest of the codebase, please rename test functions using backticks and natural language descriptions (e.g., fun recognizes simple word palindrome()). Here and in functions below.

[tarun2684]

Thanks a lot for the feedback! 🙌
I’ll update the test function names to use backticks and natural language descriptions as suggested (e.g., fun recognizes simple word palindrome()), to keep it consistent with the rest of the codebase. Appreciate you pointing that out — will make the changes shortly!

[e5LA]

Thanks for the update @tarun2684, looks really good!

Just one point - I think by mistake you have also commited entire /bin/ folder. Now, your Pull Request shows 25 changed files.