Add real gameplay screenshots to README

[PraveenGitGenius]

This PR adds real screenshots of the KeyQuest main menu and tutorial gameplay to the repository.

These screenshots help users understand the actual interface and game modes more clearly.

[PraveenGitGenius]

Hiiii... I’ve added the screenshots for the main menu and tutorial gameplay.
Please review and let me know if any changes are needed.

[csm120]

Thanks for putting this together. The screenshots themselves look like a useful start, but I’m not going to merge this PR as-is because it does not yet complete the issue scope.

Right now the diff only adds the image files under docs/assets/, but it does not actually update the README or other user-facing docs to display them. That means users still will not see the screenshots anywhere.

To make this PR mergeable, please update it to include:

• the README content where the screenshots should appear
• descriptive alt text for each screenshot
• any matching user-facing doc/site updates if needed so the screenshots are not only stored as assets

If you want to keep the change small, updating README.md with the screenshots and clear alt text would be a good next step.

[csm120]

Thanks for the contribution. I?m closing this out from the review side because it only adds the screenshot assets and does not complete the user-facing documentation change by itself.

Please continue the work in PR #9, or open one replacement PR that includes both:

• the screenshot image files
• the README update that displays them with descriptive alt text

I?m trying to keep issue #4 to one mergeable PR rather than split the assets and README changes across separate pull requests.

[csm120]

Closing this in favor of one complete, mergeable PR for the screenshots work. Please continue in PR #9 or a replacement PR that includes both the image assets and the README update.