Add comprehensive reference guides and finalize improvements

- Add QUICK_REFERENCE.md for fast access to commands and concepts
- Add CODE_STYLE.md for coding standards and best practices
- Add CONTRIBUTORS.md for contributor recognition
- Update README with all new documentation links
- Update CHANGELOG with complete list of improvements
- Enhance Community section in README

Co-authored-by: M-F-Tushar <171763969+M-F-Tushar@users.noreply.github.com>

Author: Copilot

CHANGELOG.md

@@ -49,6 +49,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Bug reporting process
   - Community guidelines
 
+#### New Documentation Files
+- **QUICK_REFERENCE.md** - Fast reference guide
+  - Quick start commands for C++ and Java
+  - Core OOP concepts overview
+  - Common code patterns
+  - Troubleshooting tips
+  - Navigation shortcuts
+  
+- **CODE_STYLE.md** - Coding standards guide
+  - C++ style guidelines
+  - Java style guidelines
+  - Documentation standards
+  - File organization rules
+  - Code review checklist
+  
+- **CONTRIBUTORS.md** - Contributor recognition
+  - List of maintainers and instructors
+  - Contribution guidelines
+  - Recognition policy
+
 #### CI/CD Improvements
 - **Enhanced C++ Build Workflow**
   - Improved error reporting with detailed statistics
@@ -65,7 +85,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 #### Documentation Updates
 - **README.md** - Enhanced main documentation
   - Added CI/CD status badges for C++ and Java builds
-  - Added comprehensive Community section
+  - Added comprehensive Community section with all new files
+  - Added Quick Reference link in callout boxes
   - Links to all new policy documents
   - Improved navigation with Support Guide reference
 
@@ -78,19 +99,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - CI/CD workflows now provide detailed compilation statistics
 - Issue tracking system now uses modern YAML templates
 - Community engagement improved with better documentation
+- README structure enhanced with more comprehensive sections
 
 ### Fixed
 - Folder naming inconsistency (Leacture → Lecture) across C++ lectures 01-06
 - Missing space in Lecture_08 folder name
 - Lack of structured issue reporting
 - Insufficient community guidelines
 - No security vulnerability reporting process
+- Missing quick reference for common tasks
+- No coding style guidelines
 
 ### Improved
 - GitHub Actions workflows with better error reporting
 - Community engagement through templates and guides
 - Documentation organization and accessibility
 - Repository discoverability with status badges
+- Learning experience with quick reference guide
+- Code quality standards with style guide
+- Contributor recognition and acknowledgment
 
 ## [2.0.0] - 2024-11-02