Proposal: add a small CI check for Python syntax and README links

[sanaullahcode]

While reading the repo I ran two quick checks and both found problems.

py_compile on all Python files found 1 file that cannot run (see issue #)
Checking every relative link in README.md found 2 of 653 pointing to paths that do not exist
Problem 1946 Java link has a typo in the folder name LargestNumberAfterMutatingSubtring
Problem 1945 C++ link has an extra leetcode/ folder in the path

Both would have been caught automatically. I would like to propose a tiny GitHub Actions workflow that runs on pull requests and does only these things

python -m compileall algorithms/python
A short script that verifies relative links in README.md exist

It adds no dependencies and keeps the repo easy for contributors. I can write the workflow and the link script and open a PR if this sounds useful. Any objections or preferences first?

Steps
Fork the repo then clone it
git checkout -b fix/max-average-subarray-python
Apply fix: git apply fix-findMaxAverage.patch
git commit -am "Fix IndentationError in MaximumAverageSubarrayI python solution"
Push then open the PR. Issue pehle file karo taake Fixes #N link ho jaye

[sanaullahcode]

LargestNumberAfterMutatingSubtring ko LargestNumberAfterMutatingSubstring karo README line 13 mein ./algorithms/cpp/leetcode/sumOfDigits... ko ./algorithms/cpp/sumOfDigits... karo