[ENHANCEMENT] Improve Template Workflow with Quality Checks

Is there an existing issue for this?

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Enhancement Description

While contributing to nuclei-templates, I noticed recurring problems:

• Missing metadata fields (severity, description, reference)
• Duplicate templates for the same vulnerability
• Unclear verification workflow

Proposal:

1. Add automated CI checks to reject incomplete templates
2. Introduce similarity checks to detect duplicates
3. Provide CVSS → Nuclei severity mapping
4. Define transparent template verification workflow
5. Create a simplified Quick Start Guide for contributors

Use Case / Problem

Currently, some templates are missing important metadata fields (severity, description, reference).
This causes confusion and reduces template quality.
It would be better if templates were automatically checked before merging.

Proposed Solution

The enhancement could work by adding automated CI checks to reject incomplete templates.
It should also include a similarity check to detect duplicates and a clear CVSS → Nuclei severity mapping.

Alternatives Considered

Alternative approach 1: Manual review by maintainers.
Alternative approach 2: Community-driven verification tags.

Additional Context

No response