Add structured Bug Report Issue Template (Fixes #6763)

[Nihhaar0002]

This PR introduces a new GitHub Issue Template specifically for reporting bugs.

• Matches the structure shown in issue #6763
• Adds clear sections for Summary, Environment, Steps, Expected vs. Actual behavior -Includes fields for configuration files, logs, screenshots, and additional context

This helps contributors report bugs more accurately and improves issue triaging for maintainers.

Fixes #6763 Let me know if you'd like any additional fields or formatting changes. Happy to update!