Add more file extentions to file type icon class

What does this MR do?

Add more file extensions as the code block mentions:

Guess which icon to choose based on file extension.
If you think a file extension is missing, feel free to add it on PR

Does this MR meet the acceptance criteria?

I guess so, let me know if it didn't.

Conformity

• Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Performance and testing

• [-] Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers