Improved code for the QR Generator

[djv554]

Pull Request for PyVerse 💡

Issue Title: Improve QR Generator code by adding new features

• Info about the related issue (Aim of the project) : To enhance the code by adding new features and improve the efficiency.

• Name: Deanne Vaz

• GitHub ID: https://github.com/djv554

• Email ID: vazdeanne5@gmail.com

• Idenitfy yourself: (Mention in which program you are contributing in. Eg. For a WoB 2024 participant it's, WoB Participant)
  Contributor at GSSoC extd and Hacktoberfest

Closes: #71

Describe the add-ons or changes you've made 📃

I have implemented the following features in the code

1. User Input Handling: includes functions to get user input for the URL, fill color, background color, and box size.
2. Validation Functions: ensures that the URL format, colour and the box size are correct before proceeding.
3. Error Handling: It raises ValueError for invalid inputs and RuntimeError for issues during QR code generation
4. Modularity: divided the code into separate functions to increase readability and maintainability.

Type of change ☑️

What sort of change have you made:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested? ⚙️

Ran it locally

Checklist: ☑️

• My code follows the guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added things that prove my fix is effective or that my feature works.
• Any dependent changes have been merged and published in downstream modules.

[github-actions]

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[UTSAVS26]

@djv554 please link the issue as well.

[djv554]

@UTSAVS26 updated

[djv554]

@UTSAVS26 Please add the appropriate labels gssoc-ext and hacktober-accepted.