Add GitHub Specific Configuration

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: ''
+assignees: IlicMiljan
+
+---
+
+### Describe the bug
+A clear and concise description of what the bug is.
+
+### Steps to Reproduce
+Please provide a code snippet or explicit steps that reproduce the behavior:
+1. Code snippet '...'
+2. Running function '...'
+3. See error
+
+### Expected behavior
+A clear and concise description of what you expected to happen.
+
+### Environment (please complete the following information):
+- RetryMaster version: [e.g. 1.0.0]
+- PHP version: [e.g. 8.0]
+
+### Actual Output / Stack Trace
+If applicable, add the actual output or stack trace received to help explain your problem.
+
+### Additional context
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[FEATURE]"
+labels: ''
+assignees: IlicMiljan
+
+---
+
+### Is your feature request related to a problem? Please describe.
+
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+### Describe the solution you'd like
+
+A clear and concise description of what you want to happen.
+
+### Describe alternatives you've considered
+
+A clear and concise description of any alternative solutions or features you've considered.
+
+### Additional context
+
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

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+---
+name: Question
+about: Ask questions about this project
+title: "[QUESTION]"
+labels: ''
+assignees: IlicMiljan
+
+---
+
+### Please describe your question
+A clear and concise description of your question. Please make sure to include as much information as possible.
+
+### What have you tried so far?
+Please describe what you have tried in order to answer your question.
+
+### Additional context
+Add any other context or screenshots about your question here.

.github/pull_request_template.md

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+### Description of Changes
+Briefly describe the changes you've made.
+
+### Related Issue
+If applicable, reference the issue that this PR addresses.
+
+### How Has This Been Tested?
+Briefly describe how you tested your changes.
+
+### Checklist
+Please confirm the following:
+- [ ] I have tested my changes and corrected any errors.
+- [ ] I have documented my changes if necessary.

.github/workflows/php-ci.yaml

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+name: PHP CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: PHP CI
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: [ '8.0' ]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          tools: composer:v2, phpunit
+          extensions: mbstring
+          coverage: xdebug
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate
+
+      - name: Install Dependencies
+        run: composer update --prefer-dist --no-progress
+
+      - name: Run Unit Tests with PHPUnit
+        run: ./vendor/bin/phpunit --coverage-clover ./coverage.xml
+
+      - name: Check Code Style with PHP_CodeSniffer
+        run: ./vendor/bin/phpcs --standard=./phpcs.xml
+
+      - name: Static Analysis with PHPStan
+        run: ./vendor/bin/phpstan analyse -c phpstan.neon
+
+      - name: Upload Coverage Reports to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml
+          verbose: true