feat: Adding instructions before checkout

[avanimathur]

Title and Issue number

Title : [Feature_Request] Adding instructions before checkout

Issue No. : #794

Code Stack : HTML | CSS

Close #794

Description

In order to simplify the checkout process, proper instructions for the user have been added.
The instructions include informing the user about
i) The information needed
ii) available methods of payment
iii) shipping methods

Video/Screenshots (mandatory)

Type of PR

• Bug fix
• Feature enhancement
• Documentation update
• Other (specify): _______________

Checklist:

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have gone through the contributing.md file before contributing

Are you contributing under any Open-source programme?

This is under GSSOC'24.

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[apu52]

@avanimathur good work