#28 first version

.github/CODEOWNERS

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+# Replace with real usernames or teams in your organization.
+* @dimanikulin/dimanikulin

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report a reproducible bug in the project
+title: "[BUG] "
+labels: bug
+assignees: ""
+---
+
+## Description
+
+A clear and concise description of the bug.
+
+## Steps to reproduce
+
+1. Go to '...'
+2. Run '...'
+3. See error
+
+## Expected behavior
+
+Describe what you expected to happen.
+
+## Actual behavior
+
+Describe what actually happened.
+
+## Environment
+
+- OS:
+- Compiler:
+- CMake version:
+- Commit/branch:
+
+## Logs or screenshots
+
+Add any relevant output, stack traces, or screenshots.

.github/PULL_REQUEST_TEMPLATE.md

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+## Summary
+
+Describe what this PR changes and why.
+
+## Type of change
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Refactor
+- [ ] Documentation update
+- [ ] CI/workflow update
+
+## Checklist
+
+- [ ] Code compiles locally
+- [ ] Relevant tests added or updated
+- [ ] Existing tests pass
+- [ ] Documentation updated where needed
+- [ ] No unrelated changes included
+
+## Validation
+
+List the commands or steps used to verify this change.

.github/copilot/copilot-instructions.md

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+# Copilot Instructions
+
+This repository is a C++ CMake template project.
+
+## Project focus
+
+- Keep changes small, explicit, and testable.
+- Preserve existing public interfaces unless the task asks for API changes.
+- Prefer portable C++ and cross-platform CMake.
+
+## Coding rules
+
+- Follow the existing formatting style in the file being edited.
+- Avoid broad refactors in bug-fix pull requests.
+- Add or update unit tests in `tests/` when behavior changes.
+- Keep includes minimal and avoid unused dependencies.
+
+## Build and test expectations
+
+- Configure with CMake and build with standard targets.
+- Run unit tests via CTest when tests are affected.
+- Keep warnings low and do not introduce obvious analyzer issues.
+
+## Documentation
+
+- Update README or code comments when behavior or usage changes.
+- Keep docs concise and aligned with implementation.

.github/workflows/copilot-review.yml

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+name: Copilot Review
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  copilot-review:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    steps:
+      - name: Post Copilot review marker
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const body = [
+              'Copilot review workflow is enabled for this pull request.',
+              '',
+              'Use this workflow as an integration point for automated review tooling.'
+            ].join('\n');
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              body
+            });