Add documentation issue template

[arpagon]

Github Issue with the following format:

• Issue Naming Convention: Start with "Docs:", followed by a concise, descriptive title. For example, "Docs: Install Guide - Incorrect Command Syntax".
• Brief Description: Summarize the issue, specifying where in the documentation it occurs (e.g., section, paragraph).
• Steps to Reproduce: List steps to reproduce the issue, if applicable, especially for incorrect instructions.
• Suggested Fix: Provide a proposed solution or improvement, like text rewrites, clarifications, or new examples.