feat/ add new file name guidelines

.github/pull_request_template.md

@@ -10,7 +10,8 @@ Contributors guide: https://github.com/TheAlgorithms/C-Plus-Plus/CONTRIBUTION.md
 <!-- Remove items that do not apply. For completed items, change [ ] to [x]. -->
 
 - [ ] Added description of change
-- [ ] Added tests and example, test passes
+- [ ] Added file name matches [File name guidelines](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/CONTRIBUTION.md#New-File-Name-guidelines)
+- [ ] Added tests and example, test must pass
 - [ ] Relevant documentation/comments is changed or added
 - [ ] PR title follows semantic [commit guidelines](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/CONTRIBUTION.md#Commit-Guidelines)
 - [ ] Search previous suggestions before making a new one, as yours may be a duplicate.

CONTRIBUTION.md

@@ -27,6 +27,16 @@ We are very happy that you consider implementing algorithms and data structure f
 - If you have modified/added code work, make sure the code compiles before submitting.
 - **Be consistent in use of there guidelines when submitting**
 
+#### New File Name guidelines
+- Use lowercase words with ``"_"`` as separator
+- For instance 
+```
+MyNewCppClass.cpp       is incorrect
+my_new_cpp_class.cpp    is correct format
+```
+- It will be used to dynamically create a directory of files and implementation.
+- File name validation will run on docker to ensure the validity.
+
 #### Commit Guidelines
 - It is recommended to keep your changes grouped logically within individual commits. Contributors find it easier to review changes that are silt across multiple commits.
 ```