feat: add the calculator project and readme.md file

Author: santoshvandari

Projects/Calculator/README.md

@@ -104,16 +104,6 @@ Create a visual calculator:
 - Scientific functions: sqrt(16), sin(90), log(100)
 - Memory operations: Store, recall, clear
 
-### Common Issues and Solutions
-
-**Problem**: "ValueError: invalid literal for float()"
-**Solution**: Add try-except blocks around input conversion
-
-**Problem**: Division by zero error
-**Solution**: Check if denominator is zero before division
-
-**Problem**: Invalid operation entered
-**Solution**: Validate operation against allowed list
 
 ## Extensions and Improvements
 

Projects/README.md

@@ -92,21 +92,4 @@ We welcome contributions to improve these projects:
 - Share project extensions and variations
 - Report issues or unclear instructions
 
-## Additional Resources
-
-### Practice Platforms
-- HackerRank Python Domain
-- LeetCode Python Problems
-- Codewars Python Kata
-- Python Challenge
-
-### Project Ideas for Further Practice
-- File Organizer
-- Weather App
-- URL Shortener
-- Markdown to HTML Converter
-- Chat Bot
-- Image Resizer
-- Budget Tracker
-
 Ready to start coding? Choose a project that matches your skill level and begin building!