Add GitHub issue templates for bug reports and feature requests

[CybotTM]

Description

Add standardized issue templates to improve the quality of bug reports and feature requests submitted to the repository.

Current State

• No issue templates in .github/ISSUE_TEMPLATE/
• Inconsistent issue quality and missing information

Proposed Changes

Create the following issue templates:

1. Bug Report Template

.github/ISSUE_TEMPLATE/bug_report.yml

Should include:

• TYPO3 version
• PHP version
• Extension version
• Steps to reproduce
• Expected behavior
• Actual behavior
• Error messages/logs

2. Feature Request Template

.github/ISSUE_TEMPLATE/feature_request.yml

Should include:

• Problem description
• Proposed solution
• Alternatives considered
• Use case examples

3. Configuration

.github/ISSUE_TEMPLATE/config.yml

Links to:

• TYPO3 Slack for questions
• Documentation
• Security policy

Benefits

• Better issue quality
• Faster triage and resolution
• Consistent information gathering
• Professional project management

Acceptance Criteria

• Bug report template created
• Feature request template created
• Config file with external links created
• Templates use YAML format (GitHub's modern format)
• Templates tested by creating sample issues

Priority

Low - Quality of life improvement

Related

TYPO3 Conformance Report: Excellence Indicators +1 point