Should I remove the main function from the code and make a test file in the test folder for this particular algorithm?

@siriak I made the necessary changes as u told on the PR, the changes include:

Reduce the size of code by dividing the code into smaller functions
Removed unnecessary comments
Removed the main
Included some Junit test cases for the code which you can access in the tests folder
Can you please check ?

I made the necessary changes as per your instructions, that is:

1. Changed the parameters for the checkCount function and passed the particular character rather than passing the entire array.
2. Changed the name of the resulting string "res" to "compressedString".
3. Changed the type of input from a character array to a string named "input".
4. Changed the reference link from Leetcode to Wikipedia.
5. Removed the unnecessary loop at the end as suggested.
6. Changed the name of checkCount function to a more descriptive name, that is, appendCount, since we are appending the count to the resulting string.
7. Changed the Junit test cases to parameterized Junit tests.
   Can you please check?