Add Student Result Analyzer for Issue #500

[CODECRAFTERSA]

Description

This PR adds a new Student Result Analyzer project for Q1 of Issue #500.

The program calculates:

• Total marks
• Average marks
• Grade based on the average
• Subjects with marks below 40

It also includes a README with project description, instructions, and sample output.

Fixes #500

• Issue_no: 500
• Not applicable

Type of change

• New project insert
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation Update

Project

• Your Project Name:

Student Result Analyzer

• Short Description:

A Python program that analyzes a student's marks and displays their total, average, grade, and subjects with marks below 40.

Checklist:

• I have named my files and folder, according to this project's guidelines.
• My code follows the style guidelines of this project.
• I have commented on my code, particularly in hard-to-understand areas.
• I have created a helpful and easy to understand README.md, according to the given README template.
• My changes do not produce any warnings.