Add GitHub issue and PR templates

[RAprogramm]

Add professional GitHub templates for issues and pull requests.

Objectives

• Create issue templates for bug reports and feature requests
• Create pull request template
• Configure dependabot for automated updates
• Improve project workflow

Issue Templates

Create .github/ISSUE_TEMPLATE/ with:

bug_report.yml

• Environment information (Rust version, OS)
• Steps to reproduce
• Expected vs actual behavior
• Minimal reproduction code
• Stack traces/error messages

feature_request.yml

• Problem description
• Proposed solution
• Alternatives considered
• Additional context

config.yml

• Link to discussions
• Blank issues option

Pull Request Template

Create .github/PULL_REQUEST_TEMPLATE.md with:

• Closes #issue reference
• Change description
• Testing checklist
• Breaking changes notification
• AI Development Protocol v2.1 compliance

Dependabot Configuration

Create .github/dependabot.yml with:

• Cargo dependency updates
• GitHub Actions updates
• Weekly schedule
• Grouped updates

Implementation

• Create all template files
• Test with sample issues/PRs
• Add REUSE compliant headers
• Update REUSE.toml annotations

Benefits

• Consistent issue reporting
• Better bug reports with all needed info
• Professional project appearance
• Automated dependency updates
• Reduced maintenance burden