docs: define core user roles and personas for community research

[cannonerd007]

Overview

This PR introduces a framework for defining AboutCode User Roles. Our goal is to identify the specific needs of our community members so we can provide more efficient documentation and tooling.

User Attributes

We are defining roles based on the following criteria:

• Professional Status: Student vs. Professional.
• Technical Depth: Technical vs. Non-technical (Management/Legal).
• Domain Focus: License Compliance and/or Cybersecurity.
• Experience: Expertise level in SCA and related domains.

Goal

Establishing these roles allows us to:

1. Poll the Community: Use these definitions to initiate a survey in the Slack #general channel.
2. Tailor Information: Ensure that "not-so-technical" users get the high-level overviews they need, while "technical" users get deep-dive documentation.
3. Bridge Knowledge Gaps: Identify who is using our tools and why, especially those in the Slack channel we don't know much about yet.

Next Steps

• Merge this persona framework.
• Initiate the Slack polling process to gather real-world user data.

[cannonerd007]

@DennisClark I have resolved the DCO (Developer Certificate of Origin) issue by signing off on the commit and force-pushing the branch. All automated checks are now passing.

This PR establishes the framework for our "AboutCode User Roles" research, including templates for the Slack poll and data collection. Could you please review these additions!!!!!