Written a function for Palindrome checker

[sarveshsrinath]

Describe your change:

Adding a file which returns a boolean value when a phrase, word or an integer is palindromic. Fixes #12165

• [x] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
• [ ] Documentation change?

Checklist:

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized.
• [x] I know that pull requests will not be merged if they fail the automated tests.
• [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [x] All new Python files are placed inside an existing directory.
• [x] All filenames are in all lowercase characters with no spaces or dashes.
• [x] All functions and variable names follow Python naming conventions.
• [x] All function parameters and return values are annotated with Python type hints.
• [x] All functions have doctests that pass the automated testing.
• [x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• [x] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

[kunaldevsahu]

def isPalindrome(N): n1=N n2=0 while N!=0: r=N%10 n2=n2*10 +r N=N//10 if n1==n2: return True else: return False

[tianyizheng02]

Sorry, but we already have multiple algorithm files for checking different types of palindromes: https://github.com/search?q=repo%3ATheAlgorithms%2FPython%20palindrome&type=code

We do not want duplicate algorithms in our repo. The issue #12165 should've never been opened in the first place.