Added testing guidelines and examples

[DDibyajyot]

Pull Request for Memfree

Description

The testing guidelines are under the lib/store/tests.

Related Issue

If this pull request addresses an issue, please link to it here. For example:

• Closes Add how to add test cases guideline #86

Changes Made

• Added new feature
• Fixed a bug
• Updated documentation
• Other (please specify)

How to Test

Please describe the steps to test the changes made in this pull request. Include any specific commands or configurations needed.

1. Step 1
2. Step 2
3. Step 3

Screenshots (if applicable)

If your changes include visual modifications, please add screenshots to help reviewers understand the changes.

Checklist

• I have read the contributing guidelines
• I have followed the code style guidelines
• My code is tested and works as expected
• I have updated the documentation (if necessary)

Additional Information

Please provide any additional information that may be helpful for the reviewers.

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[DDibyajyot]

wait some goofs happened, ill only upload the testing guideline, i dont know why the others were included