Add GitHub Actions workflow to welcome first-time contributors on issues and PRs

[talltechy]

No description provided.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (4891ccf)	1369	414	30.24%
Head commit (0483468)	1369 (+0)	414 (+0)	30.24% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#99)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

See your quality gate settings    Change summary preferences

[Copilot]

Pull Request Overview

This PR adds a GitHub Actions workflow to automatically welcome first-time contributors when they open issues or pull requests. The workflow provides helpful guidance and onboarding information to encourage community participation.

• Implements automated greeting system for new contributors
• Provides tailored welcome messages with actionable guidance for both issues and PRs
• Configures appropriate permissions and triggers for the workflow

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}